PDF malware analysis — malicious · acca179496e77d92

MALICIOUS

PDF

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

MD5: e8c1fd056f921a6a066927976a8cdf2d SHA-1: cfe3eda1a82aaefe5632ef5a477349c69d956cc5 SHA-256: acca179496e77d9260fefa3e4dd5354e7431aed0eb2bd5f94f526f2f06a75327

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, flagged by PDF_JAVASCRIPT and PDF_JS heuristics, indicates an attempt to execute code. The ML classifier also strongly suggests malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, consistent with the detected trojan.

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` `4c1191304f1443f1e21852026dc9e883a8c417d3ad3f1e569d78eaa9ce093c88`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74386 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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