PDF malware analysis — malicious · 0bb0ac901543232e

MALICIOUS

PDF

54.9 KB Created: 2009-11-07 15:02:55 +03:00 Authoring application: tendChunk (via 2b4830a2f3347c337d15976689eb7448)

MD5: 45848600a61336181ff66896ecd4df0c SHA-1: dd64f160724dfd42335757858a825c28a07d42bd SHA-256: 0bb0ac901543232e376aa104d4a6b5d6a96e268f6ad8da2c66c9aec2bd5d83f9

114 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of embedded JavaScript and an optional content group action trigger. The JavaScript stream, though obfuscated, is characteristic of exploits that download and execute further stages. The primary IOC is the ClamAV detection name.

Machine Learning

Nyx PDF Classifier malicious score 0.8729

Heuristics 4

ClamAV: Pdf.Exploit.Agent-3617 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-3617
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0052_000.js` `ddef150b51106e0742461cdc96c512834ca2302ad46ec468f7a839e259268398`	pdf-javascript-stream	PDF /JS object 52 at offset 0x7D2A	21418 bytes

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