PDF malware analysis — malicious · 3ae1b0e80cb5111d

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: 9fe5c30946deda28da7d1c3fbf12c173 SHA-1: 9299d0a9d7caff4a97b4305f32deca053d1d54eb SHA-256: 3ae1b0e80cb5111d574ebe8b8a3a8e5bb6319e0b29611d5eab99a1c5121d356d

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections confirm this file is malicious, specifically identifying it as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for this type of threat.

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` `0c3a06ee3e11419795fdfd68ffc170888dd5a491a341176e0cc7bb9b980116b7`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74942 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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