PDF malware analysis — malicious · 0983a1f0f993925f

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: 2f2cdf14f95b3aa7f2844d20f273ab42 SHA-1: e0a9048d1ef6fc0928770b4cc858d845c0b0f970 SHA-256: 0983a1f0f993925f2bafda9ab351d97fe17b4fb626bb10ee7f9a6df6c6f197af

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detection as malicious (Win.Trojan.Agent-36166). The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload, a common technique for initial execution and further system compromise. The ML classifier also strongly indicates maliciousness.

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` `007f1e4293d029c882dd0639cd3f1223c925ec7a495f803c2503b414d97a9571`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74603 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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