PDF malware analysis — malicious · 8839cf6fa7e7c41b

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via c090dUohosicilab)

MD5: fca7ae312498810b635e21ba1e6fae25 SHA-1: dd9411c39a99068983eae5a783c0e5caed235ccb SHA-256: 8839cf6fa7e7c41b4aed58df8bc87b778c63f7a22cc1083bafc347878cdb50d9

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The presence of embedded JavaScript, identified as 'pdf-javascript-stream', suggests an attempt to execute arbitrary code. While the JavaScript content itself was not detailed, its presence strongly implies the PDF is designed to download and execute a secondary payload or exploit a vulnerability. The ML classifier's high confidence score further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

Heuristics 3

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0011_000.js` `c35f939b8b08b4458e4f2307d4bfd0afc23546c955e11c1da88e87302e40c9b0`	pdf-javascript-stream	PDF /JS object 11 at offset 0x1358	3029 bytes

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