PDF malware analysis — malicious · 4295ebb97ff3c475

MALICIOUS

PDF

12.8 KB

MD5: 00a35941566798015552674ccd6fc54f SHA-1: 0ca3321504aae1b07182dd675ab9f323521f33f7 SHA-256: 4295ebb97ff3c4756dd3e2caa13a8246af759737ad8f41292ed5481ae35b2952

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 JavaScript actions and embedded JS streams, specifically a PDF metadata JavaScript eval stager, suggests the file is designed to execute malicious code. This code likely downloads and executes a second-stage payload, as indicated by the ClamAV detection name 'Pdf.Exploit.Dropped-94'.

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` `152675c60955c4e44418980f824104d8f50a235d96fa05122b2adda9ef0619fc`	pdf-javascript-stream	PDF /JS object 76 at offset 0x30F8	331 bytes

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