PDF malware analysis — malicious · bc02d161b838866b

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via 0c257Uohosicilab)

MD5: 24e4e9a9fecaaa577f8139ef8b446cbe SHA-1: a1ea5968af672d30546414c7abc68fb4a2610883 SHA-256: bc02d161b838866bf28734819d5154e3bb9ed2d649fbd76e7e4a50694fe008db

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier also flagged it as malicious with high confidence. While the document body is heavily obfuscated and unreadable, the presence of JavaScript strongly suggests an attempt to execute malicious code. The ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further supports this. The JavaScript is likely responsible for downloading and executing a second-stage payload.

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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