Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1dc7fa9fbb562b6…

MALICIOUS

PDF

11.8 KB
MD5: 3b63f830843c42e40927c6b6c70bfb1d SHA-1: 25f7b009bf3cabe0c36a3a0d9cab8a423dc412e3 SHA-256: d1dc7fa9fbb562b610ab2000302ce0dc4f2e035d573239ba0d40cc31a014e933
96 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' strongly indicates a known PDF exploit. The presence of an embedded script payload and an embedded file further supports this, suggesting the PDF is designed to drop and execute a secondary malicious payload. The lack of document body text or scripts makes it difficult to determine the exact lure or payload, hence the 'unknown family' classification.

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
f38e3c524338b2294aca09b34a8e844a1e45ef4a3f28fa5f74cefe575650e779
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11335 bytes