PDF malware analysis — malicious · 657402c6a8127c2a

MALICIOUS

PDF

6.6 KB Authoring application: Tisilarehaue (via ea127Tibedegabala)

MD5: c8c9be363a2aa6e099fde18a4142f319 SHA-1: 6c0c905d418482f14adb67052dd010aa69ff866b SHA-256: 657402c6a8127c2aef84efbb3e9aad8e894507182b9c409b22f5b16fec9ccb76

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 `eval` to achieve this, indicating an attempt to exploit the PDF reader. The ClamAV detection 'Pdf.Exploit.Agent-36142' further supports the malicious nature of the file.

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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