Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f3c55daf57bdcd…

MALICIOUS

PDF

12.2 KB
MD5: d542b5c50394f974786b0751b90838e0 SHA-1: 120d4ce5f9f4d74735d9ed3766ae1420450b5cb4 SHA-256: 47f3c55daf57bdcdbe0c032c05eba459f703104529d2e2e348f5bf985b78fa10
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically detecting it as 'Pdf.Exploit.Dropped-78'. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and download a second-stage payload. The embedded file is likely the exploit or dropper.

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
fad5ff8dfa036575c59fcf12dc746388261dcd1663136b6977445d215e0dc035
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11740 bytes