Malicious PDF — malware analysis report

Static analysis result for SHA-256 380e52431de7bf95…

MALICIOUS

PDF

11.8 KB
MD5: 6d9ad2e78a0861faa17192e5abe2eea6 SHA-1: 54490e9ad05648fc989a978d4e3563b41e4f8315 SHA-256: 380e52431de7bf95611a960233bef4bceb8257abceb518a6258e4cf3fe2d7a11
96 Risk Score

Malware Insights

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

The PDF contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded file and XFA form suggest a potential exploit delivery mechanism. The primary IOC is the ClamAV detection signature.

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
36f9ca7f73d6aa037e07de960161622f8c65559b5a72a2ba5c32a76b07a981d4
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11313 bytes