PDF malware analysis — malicious · 515b966ebde1f757

MALICIOUS

PDF

12.5 KB

MD5: 69f35778d3845791e1dc7fc7df5b7904 SHA-1: 5fda2f1ed4a9eca368f609f562fe82ecc481f2dc SHA-256: 515b966ebde1f7570ef0969c12cbd6fa9bd0590337ee842d6d8a39281ad04423

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-94' and the 'PDF_METADATA_EVAL_STAGER' heuristic indicate that this PDF contains JavaScript embedded in its metadata. This JavaScript is designed to act as a stager, which is a common technique for downloading and executing further malicious content. The embedded JavaScript stream further supports this finding. While no specific family is identified, the technique points to a downloader or dropper.

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` `b95c580ded7f7171e327f351999e58c6800af771c72a37116664acf9750e38a1`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3000	331 bytes

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