Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf5b8d2283aeb72…

MALICIOUS

PDF

26.5 KB
MD5: 5c7b3229a46d1d79ede8a5c0ea400cb9 SHA-1: 4a3a9ac600574ee664470ddad0cbf68caef72976 SHA-256: cbf5b8d2283aeb72febcfc6567a0a68a5926ff0ec13b4b5e6d5e7891adb31440
96 Risk Score

Malware Insights

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

The PDF file contains embedded script payloads and is detected by ClamAV as Pdf.Exploit.Dropped-78. The presence of embedded files and XFA forms suggests an attempt to exploit PDF reader vulnerabilities. The embedded URLs, while not directly malicious, are part of the document's structure.

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
7f2d0f32ea6c0a2c8d772dcf2e17211aa93a2b1d4dda45c0925781bb5039fed9
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 26427 bytes