PDF malware analysis — malicious · ad9a3530608d830b

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: eeb5d4823e39570d174d3571a3782b4d SHA-1: daa84de584006dad2683a1eb2996373d0a725e37 SHA-256: ad9a3530608d830b9886accb6e4fa1fc0e9a2aff325a00e3ee2064fd7ef5e0a7

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection identifying it as Win.Trojan.Agent-36166. Embedded JavaScript was also detected, indicating a likely exploit attempt. The ML classifier output of 0.999924 further supports the malicious nature of the file. The primary IOC is the ClamAV detection signature.

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` `4eb0fd4bfc5c83864d55d7cd8aaaf925240a6aba4c32af2fc0dab0bb9db5255c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74948 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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