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Feature_extraction.py
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Feature_extraction.py
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from urlparse import urlparse
import re
import urllib2
import urllib
from xml.dom import minidom
import csv
import pygeoip
opener = urllib2.build_opener()
opener.addheaders = [('User-agent', 'Mozilla/5.0')]
nf=-1
def Tokenise(url):
if url=='':
return [0,0,0]
token_word=re.split('\W+',url)
#print token_word
no_ele=sum_len=largest=0
for ele in token_word:
l=len(ele)
sum_len+=l
if l>0: ## for empty element exclusion in average length
no_ele+=1
if largest<l:
largest=l
try:
return [float(sum_len)/no_ele,no_ele,largest]
except:
return [0,no_ele,largest]
def find_ele_with_attribute(dom,ele,attribute):
for subelement in dom.getElementsByTagName(ele):
if subelement.hasAttribute(attribute):
return subelement.attributes[attribute].value
return nf
def sitepopularity(host):
xmlpath='http://data.alexa.com/data?cli=10&dat=snbamz&url='+host
#print xmlpath
try:
xml= urllib2.urlopen(xmlpath)
dom =minidom.parse(xml)
rank_host=find_ele_with_attribute(dom,'REACH','RANK')
#country=find_ele_with_attribute(dom,'REACH','RANK')
rank_country=find_ele_with_attribute(dom,'COUNTRY','RANK')
return [rank_host,rank_country]
except:
return [nf,nf]
def Security_sensitive(tokens_words):
sec_sen_words=['confirm', 'account', 'banking', 'secure', 'ebayisapi', 'webscr', 'login', 'signin']
cnt=0
for ele in sec_sen_words:
if(ele in tokens_words):
cnt+=1;
return cnt
def exe_in_url(url):
if url.find('.exe')!=-1:
return 1
return 0
def Check_IPaddress(tokens_words):
cnt=0;
for ele in tokens_words:
if unicode(ele).isnumeric():
cnt+=1
else:
if cnt>=4 :
return 1
else:
cnt=0;
if cnt>=4:
return 1
return 0
def getASN(host):
try:
g = pygeoip.GeoIP('GeoIPASNum.dat')
asn=int(g.org_by_name(host).split()[0][2:])
return asn
except:
return nf
def web_content_features(url):
wfeatures={}
total_cnt=0
try:
source_code = str(opener.open(url))
#print source_code[:500]
wfeatures['src_html_cnt']=source_code.count('<html')
wfeatures['src_hlink_cnt']=source_code.count('<a href=')
wfeatures['src_iframe_cnt']=source_code.count('<iframe')
#suspicioussrc_ javascript functions count
wfeatures['src_eval_cnt']=source_code.count('eval(')
wfeatures['src_escape_cnt']=source_code.count('escape(')
wfeatures['src_link_cnt']=source_code.count('link(')
wfeatures['src_underescape_cnt']=source_code.count('underescape(')
wfeatures['src_exec_cnt']=source_code.count('exec(')
wfeatures['src_search_cnt']=source_code.count('search(')
for key in wfeatures:
if(key!='src_html_cnt' and key!='src_hlink_cnt' and key!='src_iframe_cnt'):
total_cnt+=wfeatures[key]
wfeatures['src_total_jfun_cnt']=total_cnt
except Exception, e:
print "Error"+str(e)+" in downloading page "+url
default_val=nf
wfeatures['src_html_cnt']=default_val
wfeatures['src_hlink_cnt']=default_val
wfeatures['src_iframe_cnt']=default_val
wfeatures['src_eval_cnt']=default_val
wfeatures['src_escape_cnt']=default_val
wfeatures['src_link_cnt']=default_val
wfeatures['src_underescape_cnt']=default_val
wfeatures['src_exec_cnt']=default_val
wfeatures['src_search_cnt']=default_val
wfeatures['src_total_jfun_cnt']=default_val
return wfeatures
def safebrowsing(url):
api_key = "ABQIAAAA8C6Tfr7tocAe04vXo5uYqRTEYoRzLFR0-nQ3fRl5qJUqcubbrw"
name = "URL_check"
ver = "1.0"
req = {}
req["client"] = name
req["apikey"] = api_key
req["appver"] = ver
req["pver"] = "3.0"
req["url"] = url #change to check type of url
try:
params = urllib.urlencode(req)
req_url = "https://sb-ssl.google.com/safebrowsing/api/lookup?"+params
res = urllib2.urlopen(req_url)
# print res.code
# print res.read()
if res.code==204:
# print "safe"
return 0
elif res.code==200:
# print "The queried URL is either phishing, malware or both, see the response body for the specific type."
return 1
elif res.code==204:
print "The requested URL is legitimate, no response body returned."
elif res.code==400:
print "Bad Request The HTTP request was not correctly formed."
elif res.code==401:
print "Not Authorized The apikey is not authorized"
else:
print "Service Unavailable The server cannot handle the request. Besides the normal server failures, it could also indicate that the client has been throttled by sending too many requests"
except:
return -1
def feature_extract(url_input):
Feature={}
tokens_words=re.split('\W+',url_input) #Extract bag of words stings delimited by (.,/,?,,=,-,_)
#print tokens_words,len(tokens_words)
#token_delimit1=re.split('[./?=-_]',url_input)
#print token_delimit1,len(token_delimit1)
obj=urlparse(url_input)
host=obj.netloc
path=obj.path
Feature['URL']=url_input
Feature['rank_host'],Feature['rank_country'] =sitepopularity(host)
Feature['host']=obj.netloc
Feature['path']=obj.path
Feature['Length_of_url']=len(url_input)
Feature['Length_of_host']=len(host)
Feature['No_of_dots']=url_input.count('.')
Feature['avg_token_length'],Feature['token_count'],Feature['largest_token'] = Tokenise(url_input)
Feature['avg_domain_token_length'],Feature['domain_token_count'],Feature['largest_domain'] = Tokenise(host)
Feature['avg_path_token'],Feature['path_token_count'],Feature['largest_path'] = Tokenise(path)
Feature['sec_sen_word_cnt'] = Security_sensitive(tokens_words)
Feature['IPaddress_presence'] = Check_IPaddress(tokens_words)
# print host
# print getASN(host)
# Feature['exe_in_url']=exe_in_url(url_input)
Feature['ASNno']=getASN(host)
Feature['safebrowsing']=safebrowsing(url_input)
"""wfeatures=web_content_features(url_input)
for key in wfeatures:
Feature[key]=wfeatures[key]
"""
#debug
# for key in Feature:
# print key +':'+str(Feature[key])
return Feature