PDF malware analysis — malicious · 3f4519b5666ed413

MALICIOUS

PDF

31.6 KB

MD5: 33539f91407615622618b83c453f9541 SHA-1: f3a541efd938092f9e1d688b73b22341a44c9172 SHA-256: 3f4519b5666ed4137cc5d590e2b2643ca50270b36b501f1d1a724ac490768c7b

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF sample was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, identifying it as Pdf.Dropper.Agent-7253231-0. The presence of embedded JavaScript with an eval() call strongly suggests the execution of malicious code. This code is likely responsible for downloading and executing a secondary payload, a common technique for PDF-based malware delivery. The document body contained unreadable characters, providing no contextual clues.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7253231-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7253231-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj0032_000.js` `7b3628e63fa784e3d809016b8d7f545dba8f587d8d96700bfde4734d5580a885`	pdf-javascript-stream	PDF /JS object 32 at offset 0x2CA	3081941 bytes

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