Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89d6b64f5196ced…

MALICIOUS

PDF

12.2 KB
MD5: e8018fad2c73241cff448216c946d213 SHA-1: 0d786d61d3187cba555f116b00f6376cef6b8f76 SHA-256: e89d6b64f5196ced4fbe94a646379d5e5e8fa95ddd0aff34bd2bfed874632853
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by a machine learning classifier with high confidence and also detected by ClamAV as Pdf.Exploit.Dropped-78. It contains an embedded script payload and an embedded file, indicating it is designed to deliver a secondary malicious artifact. The presence of XFA forms and embedded content suggests a common delivery mechanism for PDF exploits.

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
acecd55557a57f827122e01ffb2dddc8902cd49937b9d8b59cf14639f7111b30
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11782 bytes