PDF malware analysis — malicious · aaffe4f4afecea50

MALICIOUS

PDF

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

MD5: ef1b0c17b323080da0b9109f64ece4eb SHA-1: 5cd6dceae59a99a886503f8cf2bc8918b3dd6ed3 SHA-256: aaffe4f4afecea5028944d4d3de281eb7dd18ef68d6cfa3a7621cb83d7cef5de

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple heuristics, including a high-confidence ML classifier and critical ClamAV detections. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics, strongly suggests the document is designed to download and execute a secondary payload. The ClamAV detection 'Win.Trojan.Agent-36166' further supports the malicious nature of the file.

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` `421fd438a8ad7fd1286bdd07dc61f9d294fb148650707c32b9a6bb3644e4e5d7`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74388 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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