PDF malware analysis — malicious · 7e947670d383d11f

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: 89a733afbe8d5886a2be5801f4d13c43 SHA-1: 9b79b2d7069865d337413e8c2aaff543d42bc93b SHA-256: 7e947670d383d11f10d4a1b561a80313facca7b8a1d548be7d6e0dda758db360

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by multiple heuristics and a machine learning classifier. It contains obfuscated JavaScript, which is typical for downloading and executing further malicious content. The ClamAV detection 'Win.Trojan.Agent-36166' is the primary indicator of the malware's nature.

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` `9237b015a9aa9432912922974a98fb37c6fbbf0ac81a28eab23792acad65957a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74423 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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