PDF malware analysis — malicious · f5aea9b7db98db39

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: bc6165a6b364261ddae3e5a0f617b01e SHA-1: b4c3cd49ccce11cebdc202bcb63e73c102da25f0 SHA-256: f5aea9b7db98db3931727ac8b69826af565415cafb022e553be6aeaa4ce81f2c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections confirm this is a malicious sample, specifically identified as Win.Trojan.Agent-36166. The embedded JavaScript likely aims to exploit vulnerabilities within the PDF reader or download a secondary payload. The presence of JavaScript actions and streams strongly suggests an attempt to execute malicious code.

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` `726aff304e0808813808654e76ab9b4e1109fa755647c72e322633d40a0f69d4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74609 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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