PDF malware analysis — malicious · 20bf4c651ed9d66c

MALICIOUS

PDF

12.6 KB

MD5: 1f0d5f39b8f9c56c78b1a53c6795b03c SHA-1: 1c028ee2573362fb2eb6f69ece45025e30637d3a SHA-256: 20bf4c651ed9d66c0d1034cf6c5d921ab06bb71fb4641f2a324b7cd51ed97311

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV, specifically as 'Pdf.Exploit.Dropped-94'. High-severity heuristics indicate the presence of JavaScript within the PDF's metadata and embedded streams, which is designed to act as a stager. This stager likely downloads and executes a second-stage payload, a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER

PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
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_obj0076_000.js` `9004a388c92e610fa96b80244f1102798e17b086dfb0922e961980ae4ae67249`	pdf-javascript-stream	PDF /JS object 76 at offset 0x301B	331 bytes

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