PDF malware analysis — malicious · ae63de78ce6e65f2

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: fd73c5d43e2d82d9b5b1d10d0b60a6d5 SHA-1: f628222fc758dc39a48e3f398d2e9ce8ce7f2998 SHA-256: ae63de78ce6e65f2cc1ccb9f20ce690bdc9df516345f97cc8c5163049230052b

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection for 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics, strongly suggests that the document is designed to execute malicious code. The primary intent appears to be the delivery of a trojan agent, likely for further compromise.

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` `ab5dd83f570c40c87fbb3469af14fc2f8fe68eef272ba193ef6bc3072cedbf99`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75141 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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