PDF malware analysis — malicious · 4316f138afcbbb27

MALICIOUS

PDF

35.7 KB Created: 2010-01-11 20:29:21 +03:00 Authoring application: manyTypeAre (via e8ff7030a0d078bec25f25c9b705d228)

MD5: c32b984ec49ddd23a8a9656c8d450e55 SHA-1: 7b188e5a45584a0902022925b191f892671255bd SHA-256: 4316f138afcbbb279d8df8fbdf74980601b9d428d3a8b7632203c8cf586fdc16

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, with heuristics indicating the use of eval() and obfuscation. ClamAV identified this as Pdf.Dropper.Agent-7255044-0, suggesting it acts as a dropper. The ML classifier also flagged it as malicious with high confidence. The embedded JavaScript likely downloads and executes a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7255044-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7255044-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0016_000.js` `874797dd3d1a0f0ead8270a52b07a4bc75f961790ce5243bf3de26cf935ea62f`	pdf-javascript-stream	PDF /JS object 16 at offset 0x249E	37307 bytes
`javascript_obj0018_001.js` `3ce0c6d654c836357f5392e4dcf7617c22d842311a55e5e48f7e6ce3a6b6f287`	pdf-javascript-stream	PDF /JS object 18 at offset 0x8317	1753 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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