PDF malware analysis — malicious · 97b50b62a3373178

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: fdccf4f42b1ff3832ec34c6aa6594ae2 SHA-1: e15a0c84e96d6ea2e63f28011365935206240c1f SHA-256: 97b50b62a337317853d63042cdb5c3fbbd91fe4c427585fa2385102b365bbc39

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged as malicious by ML classifiers and ClamAV, specifically as Win.Trojan.Agent-36166. Embedded JavaScript streams were detected, indicating the likely execution of a secondary payload. The presence of JavaScript actions and embedded JS streams strongly suggests this PDF is designed to exploit vulnerabilities or trick the user into executing malicious code.

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` `4c819a37f3bcad1c2439bac617ed2efb2c40b2aab2a7e64096368a2b4297ccfc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74785 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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