PDF malware analysis — malicious · 34dd68bf095b078f

MALICIOUS

PDF

12.3 KB

MD5: 9965cf0f5f36736a122180ed33f740df SHA-1: 2c47c5aefc0ea0c916f926adf69f4444489704c0 SHA-256: 34dd68bf095b078f0154a1006ac7f405ad1a26c375a4ef23ba2f82f76e6228bd

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. These components are indicative of a stager designed to execute arbitrary code, likely downloading and executing a secondary payload. The specific exploit used is not detailed, but the presence of JavaScript points to common PDF exploitation techniques.

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` `619392ead9d0985061501fd5ac5d380af1c50b033d59077b410eb7c783105d15`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2F19	331 bytes

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