Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f1d356b78c3621…

MALICIOUS

PDF

12.1 KB
MD5: 473be5c10b4da19564aa588cf5eff8b7 SHA-1: 45a7f9b1ec49ea61795c6433028f9d07ba3791e7 SHA-256: 47f1d356b78c36215d7a877219b2d146f2dc4da9f728e2c0cd2a880e3db70cc3
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. Heuristics show an embedded script payload and an embedded file, suggesting the PDF is designed to drop and execute a secondary malicious component. The embedded URLs are related to XFA forms, which are known to be exploited in PDFs.

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
9938ab9e2754434887aadb60137f7bea21f31cdd3c7bb08c8e21370a2e1d8cdc
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11611 bytes