Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb60f918a1ed0ce…

MALICIOUS

PDF

11.9 KB
MD5: eb732b10c21df7fe67c1721d24290ab1 SHA-1: fc25d1a8e1ed6eb64006537cd7c455d5a507dd03 SHA-256: 0eb60f918a1ed0ce9b7ffbf904c4f27d77c4e41ddb081e15c5e46e2ce065d4d7
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF with XFA forms, which is a known vector for exploitation. Static analysis detected an embedded script payload and an embedded file, strongly indicating that the PDF is designed to exploit a vulnerability and download a secondary payload. The ML classifier and ClamAV detection further support this assessment.

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 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 script payload in PDF stream low 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 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
9b185bbd7e5c061a736aa14f4be79405c449ce3c2374c568b6040d38d791134a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11460 bytes

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