Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6fb1eee02aa0b1…

MALICIOUS

PDF

93.4 KB
MD5: d8729e838ebac25f52cc190eafcd3c13 SHA-1: fa023a3dfffbf1d7b6d00131d4b63c042c29f903 SHA-256: eb6fb1eee02aa0b146d63350f37b23dc0ffb03cb62a9f8a90c6afc20b3936cee
178 Risk Score

Malware Insights

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

The PDF utilizes XFA forms, a known vector for exploitation. A critical ClamAV detection (Pdf.Exploit.Agent-6136306-0) and a high ML classifier score confirm maliciousness. An embedded script payload was also detected, likely responsible for delivering the exploit. The embedded URLs are related to XFA specifications and do not appear to be directly malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.
  • 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_pdf_script_00000246.bin
91af32ac212ef6b562ec7a45510babc732d5f5422afcdf004c7842a10ef2b96e		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94924 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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