Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd07f316faaf35a…

MALICIOUS

PDF

1006 B
MD5: 3144ce33262485bd963714ed4812db44 SHA-1: 53566691b49b7d5302bf736d08c5a67d300142a1 SHA-256: cbd07f316faaf35a5b2b1db3e1d66563817a8a03d44302f00e85b36772187bac
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Malware.Agent-9991453-0'. The presence of embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, suggests that the script is responsible for the malicious behavior. While the script content itself was not provided for detailed analysis, its existence within a malicious PDF strongly implies it's used to download and execute a secondary payload or exploit a vulnerability. The ML classifier's high confidence further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Malware.Agent-9991453-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-9991453-0
  • 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_obj0001_000.js
96e8cb29a9c4c1b863ded438cdcb59dcec732fcb3002faafd39412e037204ef0		 pdf-javascript-stream PDF /JS object 1 at offset 0x125 485 bytes

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