PDF malware analysis — malicious · 5b650054780a6530

MALICIOUS

PDF

12.3 KB

MD5: 89f640268bd11c12248fe369b7ba5b56 SHA-1: 06601714c85e02cd51d4d569c814c152749376ea SHA-256: 5b650054780a65306acdf9bc94796ebc211760a0337d6d9dab41c8424d112a15

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, including a metadata eval stager, which is designed to decode and execute a payload. The script reconstructs a string that is then evaluated, likely to download and run a secondary malicious component. This behavior is characteristic of a malicious document delivered as an 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` `a2bc563152942f4e151067f0bbab636166982ffbf6be11108b9d0639a85c6558`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2F30	331 bytes

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