Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e0477798b818be…

MALICIOUS

PDF

12.1 KB
MD5: 81f9b68c425865a542cb7176b8920027 SHA-1: 69d398b79a07d28a8fcb85f058f8e52dad6c860d SHA-256: c3e0477798b818be476a3e1e6fbea4af9c1c2b43db68a009642e96349406da6c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it is a known exploit dropper. Static analysis revealed an embedded script payload within a PDF stream and an embedded file object, both common techniques for delivering secondary malware. The presence of XFA forms and embedded files further supports the exploit delivery vector.

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
6ae34df9088bf4219f1f84f8a5c81a4a644aa771b75cb0acf20e6b5776a6d74d
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11659 bytes