PDF malware analysis — malicious · 440b104ddc25ada6

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: dcf466838ec170c8255c8878db068eb7 SHA-1: 8043d0fcd36c8b1dc303f26bb371734a008d2bbd SHA-256: 440b104ddc25ada6b807859bc310c7bcba26ed6b4142d403f9edcf4746adb243

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS rules, suggests the execution of a secondary payload. ClamAV detection of 'Win.Trojan.Agent-36166' further confirms its malicious nature and provides a specific identifier for the threat.

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` `b61b38d1dcbde5acde2ebfb9721b464db380817fd80526899e1ac48f4152e2fc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75193 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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