PDF malware analysis — malicious · 056aecf8d8a91eb7

MALICIOUS

PDF

12.7 KB

MD5: 03abadf3cf7200810cf5ba5b74782a5c SHA-1: 90a321d0def82327ded06f9648dea6d5affe2d12 SHA-256: 056aecf8d8a91eb7a3aa3308c6aa018734af330e429e68add1609bad7b1a6ee2

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is obfuscated but appears to decode and execute a payload. The critical ClamAV detection and high-severity heuristics confirm the malicious nature of the file, indicating it's likely a dropper for further malware. The JavaScript's purpose is to decode and execute a second-stage payload, as suggested by the 'eval stager' heuristic and the structure of the script.

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` `2faef81407f5e6b0a36c91c76ae33526599dd09e3f8de5de662cd4943f1a9630`	pdf-javascript-stream	PDF /JS object 76 at offset 0x30AB	331 bytes

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