PDF malware analysis — malicious · 1d58cb30f4eb51f0

MALICIOUS

PDF

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

MD5: f83937283be086a105a3e69a5cfb2315 SHA-1: ba32e018f956bc20fe6be56c2ee3e12e7ddddca2 SHA-256: 1d58cb30f4eb51f08a879382f4fc370fccc474f611b7a0556f743f54d784ae73

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged as malicious by multiple heuristics, including a critical ClamAV detection for Win.Trojan.Agent-36166. It contains embedded JavaScript, which is a common technique for delivering malicious payloads. The ML classifier also strongly indicated maliciousness. The embedded JavaScript stream is the primary indicator of the attack vector.

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` `234adf65d488435168ec5dcac7c18c64ef306dab1b8aa9dd1b2acf848bfa2fb0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	83659 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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