Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df548f4a63a1edc…

MALICIOUS

PDF

11.7 KB
MD5: 906405eccb7cbdfb69bc41e8c83ff679 SHA-1: 7c99a1ce48f9fd1b90044be7153493da40a716b4 SHA-256: 4df548f4a63a1edcec92d6bd05afd11cc330e1c60e9fb8f0f29129c6abc5c201
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file contains embedded content and an embedded script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded script likely attempts to download and execute a second-stage payload. The presence of XFA form elements suggests a potential exploit targeting XFA processing.

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
e95533f8728783efe7566021af20288b2fa0a793946b28aad6d92ea65ada08cb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11268 bytes