Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae034c09106cbdd…

MALICIOUS

PDF

27.1 KB
MD5: d5175ae20aeb222881a8ffd3a93f666f SHA-1: e2cbf0e07426c7627de7b06c2c6700ce810225a8 SHA-256: fae034c09106cbdd4f8cc0e816e4bd6d4ac8a1db9d1683500668deb34809c694
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV (Pdf.Exploit.Dropped-78) and a machine learning classifier. Heuristics indicate an embedded script payload within the PDF stream, suggesting it's designed to exploit vulnerabilities and download a secondary payload. The presence of XFA forms and embedded files further supports its nature as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
34f7b80cb3739b9726598890535f25115661882718dd4ead52259e70877a33f1
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 26972 bytes