PDF malware analysis — malicious · db8f887f4b7e095f

MALICIOUS

PDF

12.6 KB

MD5: 2452630b5f23450100b4f3595af82fb8 SHA-1: aeaafe90d3e5205b84cc5dee3b9fc4ea99965b84 SHA-256: db8f887f4b7e095f9c8f9a8a22a3cee2c1c02315a0b76c4293a5675a176dfcfd

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. Static analysis revealed embedded JavaScript within the PDF's metadata, specifically a stager designed to decode and execute further JavaScript. This indicates an attempt to exploit a PDF viewer vulnerability to run arbitrary code, likely to download and execute a second-stage 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` `4b39f9597f4f7427fa2402ded90a1f530d9281b1488d260ad952a4e83ea300f2`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3067	331 bytes

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