PDF malware analysis — malicious · 71784001ff477732

MALICIOUS

PDF

12.9 KB

MD5: 9bcdd0179e96d8436e079b73558db5b6 SHA-1: e4b384e4f44e000536e48e1bc6e83b693b370352 SHA-256: 71784001ff47773266112e47ed4130d3ea4a3891e0567fc31a4c1604edf7624d

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics as malicious. The script is obfuscated but appears to decode and evaluate a string, likely to download and execute a secondary payload. The ClamAV detection name 'Pdf.Exploit.Dropped-94' further supports its malicious nature. The primary attack vector is likely spearphishing attachment.

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` `89517e82661c99aeae59ce63f81de9f5662a2a48b32c07c912d7a51ee24f85a1`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3194	331 bytes

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