PDF malware analysis — malicious · 688a1e0dd733f5b8

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: a3e7361ace5b355cbdba5567bb02fb39 SHA-1: f34508f9da42f04cd61f9647315197c2ba12b58e SHA-256: 688a1e0dd733f5b8c84f660a7ac598766eb30380ba8bb9db0ead784f4e2c062c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by multiple engines, including ClamAV which identified it as Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to exploit vulnerabilities within the PDF reader for code execution. The obfuscated JavaScript, though truncated, strongly suggests it is designed to download and execute a secondary payload, a common tactic for malware delivery.

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` `0fdda2334d4f2a701b644f3d55c16d3295c576c99bb0df1242c5cccc2f513afc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74374 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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