Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a2bbf65f0bbadb…

MALICIOUS

PDF

11.8 KB
MD5: 9e25633c946b5d5cb40029c314c16650 SHA-1: 84caca5c62fa38d495a75ce22f35131fd62e5b55 SHA-256: 67a2bbf65f0bbadb01ef222e4db9fc23ba6c8b8ff635cd5a40c83dd018271f5a
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF file contains embedded script content and is flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Exploit.Dropped-78. The ML classifier also strongly indicates maliciousness. The embedded file suggests a secondary payload is dropped, which is then likely executed.

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
6a627351e6f6cc1f9df6ad235699cb9c6e1e4540c37dd5b7f8efd2b4ea67c4e6
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11325 bytes