PDF malware analysis — malicious · 9d1abcb5e3d3b3fe

MALICIOUS

PDF

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

MD5: fd46c563165f3be116a4b06d97946fcf SHA-1: 06d8bee5a330f2d0a5a8274d60c6b33a98585f2a SHA-256: 9d1abcb5e3d3b3fedc25df101e2f831641c774d644b99d5ae7848b5743f5eadb

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious content. Specifically, the presence of embedded JavaScript actions and streams points to an attempt to execute code. The ClamAV detection of 'Win.Trojan.Agent-36166' strongly suggests the file is a known trojan. The embedded JavaScript is likely responsible for downloading and executing a second-stage 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` `0dfee74263c4a54912450010e59c7736abcc92c475fb11268ec9ad7c080b3ae9`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75888 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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