Malicious PDF — malware analysis report

Static analysis result for SHA-256 430cdfb8662bc343…

MALICIOUS

PDF

31.1 KB
MD5: 00a81befe2b7212956dd97ee6b6b0950 SHA-1: aa8f856dd127eddfc002fce51303f15b4ed47079 SHA-256: 430cdfb8662bc3430e4663fd35de170448981128ff2053dc8042007952576aa1
146 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious Link/Object

The PDF was flagged by multiple high-severity heuristics, including PDF_EVAL and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Dropper.Agent-7255043-0. The presence of embedded JavaScript with an eval() call strongly suggests the execution of malicious code. This script is likely responsible for downloading and executing a secondary payload, a common technique for dropper malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7255043-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7255043-0
  • 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.

FilenameKindSourceSize
javascript_obj0032_000.js
ffb6fe3752149335fcb92a66084539d0d63d61ec72d0772ebc0d84b1430567dc		 pdf-javascript-stream PDF /JS object 32 at offset 0x2CA 3027677 bytes

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