PDF malware analysis — malicious · 07d38370361a0827

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: 5750942dbd18ad13d5917d01e068a8b2 SHA-1: b8766fb47353dc49a50744059d383f7846309721 SHA-256: 07d38370361a08278c5485da083d667a703bf00331a81a8aa5194979b6656ab1

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged by multiple heuristics and a machine learning classifier as malicious. ClamAV also detected it as Win.Trojan.Agent-36166, indicating it likely attempts to exploit vulnerabilities to download and execute a secondary payload. The JavaScript code is heavily obfuscated, making its exact function difficult to determine, but its presence and the overall malicious classification strongly suggest an exploit attempt.

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` `e48d223264b231b548fac3f842c716cfb47ced23f966099b436424f8d93322cd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75164 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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