PDF malware analysis — malicious · 2527eac923c9cb36

MALICIOUS

PDF

12.4 KB

MD5: 1b47b7fb9d1c207021b83d3107908f92 SHA-1: 1cc814dc4e47aadaf3bfd9f9ccb9bad81a94cc13 SHA-256: 2527eac923c9cb3648b21e7c95ef51f4f3bbd6becfa9af46d7e28bd94a4e4683

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, indicating it contains an exploit. The presence of embedded JavaScript, specifically a metadata eval stager, suggests the PDF is designed to execute arbitrary code. This script likely acts as a stager to download and execute a second-stage payload, contributing to the overall malicious intent of the document.

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` `a6e93e045a07c892f5dc5f13b8f2ff0d156985047baeebc4dc5c06648d8fd331`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2F9F	331 bytes

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