Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3a6ef8688bc1a8…

MALICIOUS

PDF

19.4 KB
MD5: 5e0d3e06e15d2524b24d76058f51b5cf SHA-1: 20a91aa9906b6db06b9b1ab55f41f1f42cfc820d SHA-256: fd3a6ef8688bc1a89d5882fc9a3d8eb9610e4411bc20a414a886d67570c7ac13
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 also detected this file as Pdf.Exploit.Dropped-78, suggesting it's a known malicious PDF exploit. The embedded file artifact, embedded_file_obj0008.bin, is likely the delivered payload. The XFA form and embedded file heuristics further support the malicious nature of the document.

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
326110abc492e9b0b7ca05b18f3dbe4267e2b1f885057dfaf6f3e4cf24523e17
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19078 bytes