Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf17311e1be37ed2…

MALICIOUS

PDF

11.6 KB
MD5: 44f16f3d8e61b96bc906d5678ba0f71f SHA-1: 66dd766c28a8e49cccf656a5fc4ccbb6af9acf5f SHA-256: cf17311e1be37ed2afa90b85620432f91e950bd1c93cd412caa0c0aed6f3909b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic strongly indicate that this PDF is designed to exploit a vulnerability and drop a secondary payload. The embedded file artifact further supports this. While no specific script content is visible, the presence of embedded exploit code is clear. The benign Adobe URL is likely a red herring or part of the exploit structure.

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
5e9e3abc02c7b907fb4c2c8ae5a5c2e51d0f489a59fafc2bdc276d184093a9cb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11136 bytes