PDF malware analysis — malicious · efb2e5ac45d25b76

MALICIOUS

PDF

6.6 KB Authoring application: Tisilarehaue (via bdc76Tibedegabala)

MD5: dba5afeb2679d34c6b37b58a87dab7f5 SHA-1: 78a5878659be16716e4efd607ef4c559cce39429 SHA-256: efb2e5ac45d25b76c45656657d8ae2142a62b39d461f9df5eb4500595e3f0b92

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically an exploit. While the document body is unreadable, the presence of JavaScript points to an attack pattern involving the exploitation of PDF vulnerabilities to execute arbitrary code. The exact nature of the JavaScript payload could not be determined due to its obfuscation or truncation.

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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