Malicious PDF — malware analysis report

Static analysis result for SHA-256 af82d7eeaeec8064…

MALICIOUS

PDF

26.3 KB
MD5: 82ff3884db44cc6dca836c89f0471d8d SHA-1: f019cc6b4a6460532d9405a9457fa377bbb28bff SHA-256: af82d7eeaeec8064be350c3f172919ee46f8080b78ba918ca03154bc1f1a4be5
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 indicate that this PDF contains and likely executes an embedded malicious script. The embedded file artifact further supports the delivery of a secondary payload. The exact nature of the script's execution is unclear due to obfuscation, but the overall pattern suggests exploitation of a PDF vulnerability to drop further malware.

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
7ede4a2969586d75a924124e9eec52a7f90fbaf1a292bd0762b6eb57395dc1c4
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 26161 bytes