PDF malware analysis — malicious · 10db38d223b6d541

MALICIOUS

PDF

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

MD5: 9c9ca6aca082a8392081ceeb077b733b SHA-1: 0c327e444626c0f246e9180050f4d7eb57fb3948 SHA-256: 10db38d223b6d541df9817ef22750ac2b51ab10a8ece673216641e92a2ee6c2a

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged by multiple heuristics, which is designed to download and execute a secondary payload. ClamAV detection of 'Win.Trojan.Agent-36166' further confirms its malicious nature. The presence of JavaScript and the overall malicious verdict strongly suggest this PDF was delivered as a spearphishing attachment.

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` `a3030059367256d762b62b3eaa1f7f01cda0941b877c9ff4d08ffac064e7e440`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75119 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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