PDF malware analysis — malicious · 93c8de67074ffc06

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: ef9c36f6cd3d4b9a5dddc99fbdfa1317 SHA-1: 43362b701db470aca97a122bc291bde83e1f93b4 SHA-256: 93c8de67074ffc06b328b1873ba1b05ad179d293a7470a61a29cd41ad74ca82d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings. The ML classifier and ClamAV detection strongly suggest malicious intent, identifying it as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for executing the malicious 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` `7bd5bb36c2cd24d655f2cf888ba1b33445f1247787aecee4336d9840997b0d92`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74742 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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