PDF malware analysis — malicious · 7faa924c9bb06b0e

MALICIOUS

PDF

13.0 KB

MD5: 38f771b0d0f04fa18c8d986133c0aec3 SHA-1: 5411ec53067370d73350cd58b09fdf9e465a3204 SHA-256: 7faa924c9bb06b0e57d9bfd96e80dc47c9595ba8a17bb3d168581299db271304

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by ML classification and ClamAV with the signature 'Pdf.Exploit.Dropped-94'. Heuristics indicate the presence of embedded JavaScript within the PDF's metadata and a separate JS stream, suggesting an exploit stager. This JavaScript is likely responsible for downloading and executing a secondary 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` `cbffa0c3b809c3c7552533b4745217637c51dab4f4de403f90ae5aae244082f7`	pdf-javascript-stream	PDF /JS object 76 at offset 0x31BA	331 bytes

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