PDF malware analysis — malicious · 64a85b814c6369a9

MALICIOUS

PDF

12.6 KB

MD5: 5e4b512e201a3c4bb24e34eca2e42a3a SHA-1: 3d4215553e022f4f8154bdc832b8b06657858c06 SHA-256: 64a85b814c6369a9a158b7194edd64e18ddf8bda7c50f0a876b1d8360581e1ce

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript within its metadata, which is designed to decode and execute a stager. This stager likely downloads and executes a second-stage payload, as indicated by the 'Pdf.Exploit.Dropped-94' ClamAV detection. The JavaScript obfuscation and eval usage are common techniques for initial payload delivery.

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` `8bb6bdc2720c9a1aaed80b2d8755cf127fa8db48fbcad9f632311c771f4a5b2b`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3063	331 bytes

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