Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e5d8a9aca8e8eb…

MALICIOUS

PDF

100.2 KB
MD5: 7cba6addb6832cdcfbfef26eca789da5 SHA-1: 99a13a2d61fad1e9e514611dbb587e32c7971a0b SHA-256: 31e5d8a9aca8e8eb4adbccd4800ec818a931d00a8b1af9cde799407186f536b4
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form and an embedded script payload, strongly indicating malicious intent. ClamAV detections confirm this, identifying it as Pdf.Exploit.Agent. The embedded script is likely responsible for delivering the malicious payload, though its exact function is not fully discernible from the provided evidence. The URLs present are related to XFA schemas and Adobe, but do not appear to be directly malicious.

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
5dc63fa25f55ad08125f12952e0ed7eeda8ee771a0e51f3b55892f9884406cf6		 pdf-embedded-script PDF raw stream script payload at offset 0x246 101930 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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