Malicious PDF — malware analysis report

Static analysis result for SHA-256 823954e744a5be51…

MALICIOUS

PDF

79.0 KB
MD5: 5256f4a320fc05f7f584092f41f3a214 SHA-1: 3228dc6d46b63dbf4b860b7274f996785fcaa2e4 SHA-256: 823954e744a5be51fe9a7aa8b4330eec14c69cef409df32c85aa539208f571d1
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file utilizes XFA forms, a known vector for embedding malicious scripts. ClamAV detections indicate the presence of an exploit targeting PDF documents, specifically identified as 'Pdf.Exploit.Agent-6136306-0' and 'Pdf.Exploit.Agent-36769' on an extracted artifact. The embedded script payload is the primary mechanism for delivering the malicious content, likely leading to further exploitation or malware execution.

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_0000023e.bin
cf8294b1eaf97a0351bb010a010a43c3c25b6d35b3a1a204b25186632dc6a961		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80211 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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