PDF malware analysis — malicious · f39468d4621d8260

MALICIOUS

PDF

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

MD5: 59d2cf211372d833ed47f15f0c28a097 SHA-1: 536e59e7197c675bcb925fff318413ca817997b9 SHA-256: f39468d4621d8260c35de79788ab83b0643695c388c398cf6201b7fc4c13ae32

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) further confirm its malicious nature. The JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for this type of malware. The document body is unreadable, so the rationale is based solely on the technical indicators.

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` `09669e2e828c6c6c6754e8bd8a7dc9d0781b0e0331a44bdb42e049d9312358c0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74819 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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