PDF malware analysis — malicious · 22a1798e33fbd9a5

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via 4973eUohosicilab)

MD5: c62125e1a5165bee7519f00472bcffce SHA-1: 5691bfd8d83a8e42108ded0b29acc4394e7949f1 SHA-256: 22a1798e33fbd9a5b3e1fe1b4e3e74b87be359b65d8423f598b6b6e2f3c80b28

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier. The presence of embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS firings, suggests an attempt to execute arbitrary code. While the document body is unreadable, the JavaScript stream is the primary indicator of malicious intent, likely to download and execute 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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