alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT PDF Name Representation Obfuscation of JS"; flow:established,to_client; file.data; content:"obj"; content:"<<"; within:4; content:"/"; within:50; content:!"JS"; within:2; content:"#"; within:4; pcre:"/\x3C\x3C(\x0D\x0A|\x0A)[^>]*\x2F[^JS](J|#4A)(S|#53)/smi"; reference:url,blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/; classtype:bad-unknown; sid:2011535; rev:5; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2010_09_27, deployment Perimeter, signature_severity Major, tag Web_Client_Attacks, updated_at 2024_04_09;)