PDF malware analysis — malicious · fec9baf3c6c0ae49

MALICIOUS

PDF

9.3 KB Created: 2009-06-02 09:07:08 Authoring application: VrtVKVNNLQhctsyJ (via enUhRQGXSoYoEaaQgT)

MD5: 9b3ef04f512555ab13abded34d60287d SHA-1: 6ba0e785c70e23da72cbfc474c77177e89b005de SHA-256: fec9baf3c6c0ae49a3002bc766a2cdd27c92f71a63a368dc59615c04fee6feca

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by a machine learning classifier and ClamAV as malicious (Pdf.Exploit.Agent-35572). It contains embedded JavaScript, indicated by heuristics like PDF_JAVASCRIPT and PDF_JS. The JavaScript is likely responsible for executing the exploit, as suggested by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings. No document body text was available for further analysis of the lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `66f3db93767f730d23ac375397a9e768bde7b7f955a6eb5ea9a0c39cc15120d4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x444	7715 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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