PDF malware analysis — malicious · 3849d4d975b9473b

MALICIOUS

PDF

12.5 KB

MD5: 412e50255c2f62dc0015cd21cb901f45 SHA-1: 06ec945c2420dc3e78bb397a9b74bcf2f81705dc SHA-256: 3849d4d975b9473b5730812b3efe7a68351e80498189217d8682bd8fa0a24ddd

116 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious JavaScript

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-94' strongly indicates malicious intent. Low-severity heuristics for PDF JavaScript actions and embedded JS streams confirm the use of scripting within the PDF. The 'PDF_METADATA_EVAL_STAGER' heuristic suggests that JavaScript is being used to decode and execute further code, likely to download and run a second-stage payload. No document body text was available for analysis, but the presence of JavaScript and the ClamAV signature point to an exploit delivery mechanism.

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` `9b947616a627b5cc355eb07ac7ebb17f24f5695d336b9bc5a1ef158d35ad6a65`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2FB5	331 bytes

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