PDF malware analysis — malicious · 66b74663363724af

MALICIOUS

PDF

6.6 KB Authoring application: Tisilarehaue (via 0f351Tibedegabala)

MD5: 095d86f54f1dc49a75d52dabfb966215 SHA-1: 712ee276bb88f204e6fc7516cf09ba407f4da6ed SHA-256: 66b74663363724af308862cb3a9e544556db738b20ced7755149ea5723b14734

106 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that is obfuscated but appears to be designed to decode and execute a second-stage payload. The script uses string manipulation and `app.eval` to achieve this, indicating an attempt to exploit the PDF reader. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

Heuristics 3

ClamAV: Pdf.Exploit.Agent-36142 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36142
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_obj0010_000.js` `d4dce4f95f7146e3b127d68edf45ceb045483a205d9e9a2a53d6e6b80d83b663`	pdf-javascript-stream	PDF /JS object 10 at offset 0x1230	1728 bytes

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