Malicious PDF — malware analysis report

Static analysis result for SHA-256 defed27d198b0a40…

MALICIOUS

PDF

19.3 KB
MD5: 554f815057d640d1668c1d3cafc5f7c6 SHA-1: f0c2d6f57f4ac3edc1d5a80f61450d9ad41c4d40 SHA-256: defed27d198b0a400d2a79c954312abfffaade61c1030a30084dd0f8cbb10588
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing 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 exact nature of the exploit and the delivered payload could not be determined due to the lack of readable script content.

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
28186c38597586ac9b551faa40e3f19561413b3ee72196fc6409950d6ed2ef21
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18963 bytes