PDF malware analysis — malicious · c0ac0d734a552185

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: b21da7bc05a0778ccecd160525e9d41e SHA-1: f6cd9565b4726f7c7f73335e0fab48648dbd1718 SHA-256: c0ac0d734a552185995f956bbd7aac6203675ded76ac20cf2aa46d55edc5166b

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The presence of embedded JavaScript (PDF_JAVASCRIPT, PDF_JS) indicates an attempt to execute code. ClamAV identified the threat as Win.Trojan.Agent-36166, suggesting a known trojan agent. The embedded JavaScript likely facilitates the download and execution of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `4024bdc1a3fdb6ce0b926c656d656ed6ffc695e552275f3ca2951c329ac43413`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74695 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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