PDF malware analysis — malicious · 60b998974aeb5600

MALICIOUS

PDF

12.7 KB

MD5: b1611b36cd90e8f6a747f22563f07f07 SHA-1: 050f88a3e5692c8e89715637e838791a41728c9b SHA-256: 60b998974aeb560009d28caf3504c5d7f24e43bdaee168a88b1e82c231dbeffe

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The JavaScript code appears to be an eval stager, designed to decode and execute a payload. The script reconstructs a string which is then evaluated, likely to download and run a secondary malicious file. This is further supported by the critical ClamAV detection of 'Pdf.Exploit.Dropped-94'.

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` `453ced753fdc44826ab0097b4b083055bd17d8e7b50891ba13c36baf38028237`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3084	331 bytes

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