alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Unkown exploit kit pdf download"; flow:established,to_server; flowbits:set,et.exploitkitlanding; http.method; content:"GET"; http.uri; content:".php?"; content:"x=x"; fast_pattern; content:"&u="; content:"&s="; content:"&id="; content:"&file="; content:".pdf"; classtype:exploit-kit; sid:2014657; rev:2; metadata:created_at 2012_04_30, signature_severity Major, updated_at 2020_04_21;)