Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1361b6d43eba5fa…

MALICIOUS

PDF

11.8 KB
MD5: 3d45d39d3e9abaf3be44a4742815291d SHA-1: 4ad579d2354bfae452501d7e4d1137597b9c32c2 SHA-256: d1361b6d43eba5fa5d95a4b5119b40d09f92f43a682416e73e1697e22131df1a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF file was detected by ClamAV as Pdf.Exploit.Dropped-78, indicating it contains an exploit. The presence of an embedded script payload and an embedded file further supports this. The embedded URLs are related to XFA forms, which are sometimes used in PDF exploits. The exact nature of the exploit and payload is not clear from the provided heuristics, but it is designed to deliver a malicious file.

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
50fb7244d0898a2493b46a046b14b0f85751ce50ca46024814715f8003743b84
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11335 bytes