PDF malware analysis — malicious · 7a7024ce7d08ac34

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: ef73ed2d11909e57048ba421825ece8e SHA-1: 20c43a805738e03d7efd5506f07223d6a35d6ff1 SHA-256: 7a7024ce7d08ac34104edfcbd1833f61cb0beb7d25d53db77153b2656c39bf37

166 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, which identified it as Win.Trojan.Agent-36166. Embedded JavaScript was detected, indicating an attempt to execute code within the PDF viewer. The script likely downloads and executes a second-stage payload, a common technique for this type of 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` `fa52acc78c41566f875f325187a6ba4aa952177e4e5045e3e0fb13e7af8be2db`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74995 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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