PDF malware analysis — malicious · c8fafa3b0e4c7cd9

MALICIOUS

PDF

12.1 KB

MD5: f26db15b036e2b7044b604d86328d01d SHA-1: 2a0cf0ed6f284298b4f51d584cda7f1cce9486a7 SHA-256: c8fafa3b0e4c7cd919c8cff3f5876b3265c98183ac1bc3427bfabb05821e80c7

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'PDF_METADATA_EVAL_STAGER' heuristic indicates that JavaScript within the PDF's metadata is used to decode and execute further code. This pattern is characteristic of exploit-laden PDFs designed to download and run additional malicious content. The ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature.

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` `7ac5a3fcd211202f5b7c34d680f050ce6a2d8ce23b8dc40f87b09f794a4b3644`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2E47	331 bytes

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