PDF malware analysis — malicious · 3d2331e984364f01

MALICIOUS

PDF

12.6 KB

MD5: c242a5c8bca9874cd83338726a254992 SHA-1: b6552d5b468cd9ae599f74da600a6a891e62d013 SHA-256: 3d2331e984364f01abd37e7bb5326ef0e058ab8fcce99e2378a27d1dc765bd09

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, which identified it as 'Pdf.Exploit.Dropped-94'. Static analysis revealed embedded JavaScript within the PDF's metadata and a separate JS stream, indicating an attempt to exploit PDF viewer vulnerabilities. The primary attack pattern involves leveraging these JavaScript components to execute malicious code, likely leading to the download and execution of a secondary payload.

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` `38d9f5becf335443e79e8a338edead518e0f79916d1b66e40cef874bd7da6471`	pdf-javascript-stream	PDF /JS object 76 at offset 0x305D	331 bytes

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