alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED BlackHole 2 PDF Exploit"; flow:established,from_server; file_data; content:"/Index[5 1 7 1 9 4 23 4 50 3]"; flowbits:isset,ET.pdf.in.http; reference:url,fortknoxnetworks.blogspot.com/2012/10/blackhhole-exploit-kit-v-20-url-pattern.html; classtype:trojan-activity; sid:2015804; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2012_10_16, deployment Perimeter, malware_family Blackhole, signature_severity Critical, tag Blackhole, tag Exploit_Kit, updated_at 2019_07_26;)