PDF malware analysis — malicious · 0a2c8707d760c5d5

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via 63338Uohosicilab)

MD5: 62989caec63876e2f79b322370123ebf SHA-1: 4bcb390fb3d1e2190483566d04bc5f5d24ebcfec SHA-256: 0a2c8707d760c5d513bddbea5e188f60fc79bb3298725d619fe92fb3266a681f

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, flagged by multiple heuristics and identified as malicious by ClamAV. The JavaScript code appears to be obfuscated but contains patterns indicative of executing arbitrary code, likely to download and execute a second-stage payload. The primary technique observed is the use of JavaScript within a PDF document to achieve code execution.

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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