alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT PDF With Embedded U3D"; flow:established,to_client; content:"obj"; content:"<<"; within:4; content:"/U3D"; within:64; reference:url,www.adobe.com/support/security/advisories/apsa11-04.html; reference:cve,2018-4989; reference:cve,2018-4987; classtype:bad-unknown; sid:2013995; rev:3; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2011_12_08, cve CVE_2018_4989, deployment Perimeter, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26;)