PDF malware analysis — malicious · 253f5d37b22ab407

MALICIOUS

PDF

12.8 KB

MD5: 851eecf5784758885b94fedaf9531ea2 SHA-1: 0d98d41b91085f90e4c7fedfb49cbd3f4cb3a96b SHA-256: 253f5d37b22ab407175c487bc74d1cda94605573d9e176bd6dba60eb8d8cd7a4

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV detection 'Pdf.Exploit.Dropped-94' and the 'PDF_METADATA_EVAL_STAGER' heuristic indicate that this PDF is designed to exploit vulnerabilities and download additional malware. The embedded JavaScript stream, identified by 'PDF_JAVASCRIPT' and 'PDF_JS', is the mechanism used to achieve this, likely by evaluating code hidden within the PDF's metadata. The exact nature of the payload is not discernible from the provided evidence.

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` `e160eed51c9144177114949d27076ed7c8f9d25b541621d10fc812b710d6dfba`	pdf-javascript-stream	PDF /JS object 76 at offset 0x30EA	331 bytes

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