Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d03ffb0b052c33…

MALICIOUS

PDF

12.1 KB
MD5: 628fb9022bf5e8fe32a49f5ea323b058 SHA-1: c0c3ae38f6ea63fadfb08ed63b1f7c0dcd61c7f8 SHA-256: e4d03ffb0b052c332ac81e76c526657a026b97140dfbbf9544078958c54e4d33
96 Risk Score

Malware Insights

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

The critical ClamAV heuristic indicates this PDF is a known exploit, specifically 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file further supports the malicious nature. The embedded URLs are benign or unknown, and the document body is too obfuscated to provide further context. The primary attack vector appears to be exploiting a PDF vulnerability to drop a secondary 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
e7b7e57a0183bff4360043992624afe488023d4c4a55a4a3a73dd7c45b3905a7
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11641 bytes