PDF malware analysis — malicious · 337e4a0c29681fc4

MALICIOUS

PDF

12.6 KB

MD5: c96da85e4e0ba9ef6d38dc5c07be9deb SHA-1: 6c2dd1303efb0524a801a976e8ed591a4bc7bea4 SHA-256: 337e4a0c29681fc4bf8f382ba5153d83ca672c5bd6da82de3f05a65f616ee075

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by a ClamAV signature (Pdf.Exploit.Dropped-94) and a machine learning classifier. High-severity heuristics indicate the presence of JavaScript within the PDF's metadata, likely used as a stager to decode and execute further malicious code. The embedded JavaScript stream further supports this, suggesting an attempt to download and execute a second-stage 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` `867f80181e16642903c2e14c3ce7c065bee9e618d717047e725469b2e8740f43`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3028	331 bytes

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