PDF malware analysis — malicious · b112edbf62b51462

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: f97ed586ec9e84625bb1315208809613 SHA-1: 7e2f1f96d6686db7e3c6a912268b580c274914a0 SHA-256: b112edbf62b51462f907a8f027e0e7f6820573484d8a3b2336a60a7ee03160f6

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. Embedded JavaScript was also detected, suggesting the document's primary purpose is to execute malicious code. This code likely downloads and executes a second-stage payload, aligning with common trojan delivery techniques.

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` `80aa4319cac96ef6003e5670f62daff0aef92bcb03664070b4e831d73def7f01`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74793 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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