PDF malware analysis — malicious · 6ef5b71658adb220

MALICIOUS

PDF

59.2 KB Created: 2006-02-16 15:03:51 -08:00 Authoring application: lice (via ubst)

MD5: e82fa3c114bd86460318896d8fdd7b40 SHA-1: f64283891e83c7e3ff404506ad9d73bf5f92420e SHA-256: 6ef5b71658adb220d037b079aef3d19a2e2aee77eeac0065a8ecaf07538885fb

106 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, specifically as 'Pdf.Exploit.Dropped-94'. It contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities to download and execute further malicious content. The JavaScript appears to be obfuscated, but its presence and the critical heuristic firings strongly suggest a malicious intent to deliver a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
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_obj0076_000.js` `5cac6e72cd25b8e1ff3fffb912b59f36f5e746c49b4612b9c650a88abedafd23`	pdf-javascript-stream	PDF /JS object 76 at offset 0x955	50638 bytes

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