alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING PDF Containing Subform with JavaScript"; flow:established,to_client; file_data; content:"%PDF"; within:4; content:"subform"; nocase; distance:0; fast_pattern; content:"script"; nocase; distance:0; reference:cve,2017-2962; classtype:attempted-user; sid:2014154; rev:6; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2012_01_28, cve CVE_2017_2962, deployment Perimeter, confidence Medium, signature_severity Major, tag DriveBy, updated_at 2019_07_26;)