PDF malware analysis — malicious · b5b2696ba9964734

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: 6483bae8c6c646de091b950e0d0ddafb SHA-1: 8b78517badf44c62970eb7827fc95b689d815da5 SHA-256: b5b2696ba99647343064a53d6000f7b2ecad9d8e95f26ab63cd9f53c2902b414

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF document flagged as malicious by ML classifiers and ClamAV, specifically identified as Win.Trojan.Agent-36166. It contains embedded JavaScript, which is a common technique for delivering second-stage malware. The JavaScript's presence and the ClamAV detection strongly suggest the file's intent is to download and execute malicious code.

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` `95f273111e73bb6d6ed49f87c2bb8bf2df39d1a44506a1b0563cec5ed9f6842d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75178 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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