PDF malware analysis — malicious · b967e5a2a8625f22

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: fb196d71ad41a8ec44f31e6c6f40856b SHA-1: 2b3877a9b62164afb2161c7da8e1d87f98ddd0b8 SHA-256: b967e5a2a8625f2241fc65fe56819ae6b462e757ffe66254bc6f124402c43160

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The presence of embedded JavaScript, indicated by 'PDF_JAVASCRIPT' and 'PDF_JS' firings, suggests the file is designed to execute a secondary payload. The ClamAV detection 'Win.Trojan.Agent-36166' further confirms its malicious nature and provides a specific identifier for the detected threat.

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` `87bd1a98baa9390181a85cee6d33f1bda5ee17dfaca78425d9a2c92b47537a3a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74631 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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