Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc75561794b78c62…

MALICIOUS

PDF

11.9 KB
MD5: 9937fc3b3f454b94f14db49d2ac9562a SHA-1: 5682ed4d9425b5fc18dfb9c676767b4a5573c453 SHA-256: cc75561794b78c62d3cfdfb2072631dcb1563c9f77602d778440836316e848a6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The PDF contains embedded script content, suggesting it attempts to exploit vulnerabilities upon opening. The embedded file artifact further supports the payload delivery mechanism. While the specific family is not identifiable, the techniques point towards a common PDF-based exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
4490e18bfb8e22c444cca9c0a7dd72486176cedb4dbd8848d1544b34cdfa45df		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11434 bytes

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