ET MALWARE Possible PDF Dictionary Entry with Hex/Ascii replacement

7.0.35.0SID: 2017899Rev: 5Enabled3 views
Sourceet/open
Fileemerging-malware.rules
CreatedDecember 24, 2013
UpdatedMarch 13, 2024
Classificationtrojan-activity
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible PDF Dictionary Entry with Hex/Ascii replacement"; flow:established,to_client; file.data; content:"%PDF-"; fast_pattern; within:5; content:"obj"; pcre:"/^[\r\n\s]*?<<(?:(?!>>).)+?\/[a-zA-Z\d]*?#(?:[46][1-9a-fA-F]|[57][\daA])(?:[a-zA-Z\d])*?#(?:[46][1-9a-fA-F]|[57][\daA])/Rsi"; classtype:trojan-activity; sid:2017899; rev:5; metadata:created_at 2013_12_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_13;)

Metadata

created at2013_12_24
confidenceMedium
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_03_13

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