PDF malware analysis — malicious · 4cb0c57c9565addb

MALICIOUS

PDF

12.6 KB

MD5: 2b357db5b0553faa3f12b25a3cc6d158 SHA-1: 383b458b9957bff4079c4d4e6e523c3b074e33aa SHA-256: 4cb0c57c9565addb5c44515d60dfcc0e39df56c6d5c10a12df3523aa1ae56578

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-94. High-severity heuristics indicate the presence of JavaScript embedded within the PDF's metadata, specifically designed as an eval stager. This suggests the document is intended to exploit a PDF viewer vulnerability to download and execute a secondary 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` `de7122bb13a05c5ab4e70e163f75c375d83cd1edcb30aaabcb86c3f3bb669c00`	pdf-javascript-stream	PDF /JS object 76 at offset 0x306E	331 bytes

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