PDF malware analysis — malicious · b1c45de2b5310d08

MALICIOUS

PDF

7.5 KB Authoring application: Jgaxivakafowizasi (via a894dUohosicilab)

MD5: 20f0f09090ac9c7de0ed4fcadaf6f691 SHA-1: f4ba0bcd3229277e631cc4bd061a5f3568851462 SHA-256: b1c45de2b5310d081976bb1d4909f105c16204718af5d459e3c18683b50ad57d

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded JavaScript stream, named javascript_obj0011_000.js, is the primary indicator of malicious activity. While the exact script functionality is not detailed, embedded JavaScript in PDFs commonly serves to download and execute further stages of malware.

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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