PDF malware analysis — malicious · 681535ce9ec57c8b

MALICIOUS

PDF

6.5 KB Authoring application: Tisilarehaue (via 45f51Tibedegabala)

MD5: 95e3046e085d8c33261aec2f439f1cf7 SHA-1: b79b1b8a74cbde43ab5d1a52931f7375e2c7aa68 SHA-256: 681535ce9ec57c8be65e3feccda73a6eb53ad6fd3cadaff23f5e4b729dd3ca54

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 download and execute a second-stage payload. The JavaScript attempts to construct a URL by concatenating various string fragments and then uses `eval` to execute it. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to exploit delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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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