Malicious PDF — malware analysis report

Static analysis result for SHA-256 408f4e45a89b26c6…

MALICIOUS

PDF

25.9 KB
MD5: 5752031c5f0af8576b8e4e87082f48f4 SHA-1: f3bb4f003cd4ae0875d8afa8542d08caa5f18865 SHA-256: 408f4e45a89b26c6615a1422bfbd3816c489addd8749cc30cf461bcb8d296d59
96 Risk Score

Malware Insights

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

The PDF file contains embedded content and a script payload, as indicated by multiple heuristic firings including 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'CLAMAV_DETECTION'. The ClamAV detection name 'Pdf.Exploit.Dropped-78' strongly suggests it's a known exploit dropper. The embedded file and script are likely used to download and execute a second-stage payload.

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
ed603fa736990a065dee2961ccfc39660e1a82797be61a1c62f5548b58a9530e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 25791 bytes