Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f78ed73f8020b7e…

MALICIOUS

PDF

93.3 KB
MD5: 53147024ba16862242885ba89e054089 SHA-1: e656abde8ca4c416712f07a8a140e913b02ee3a1 SHA-256: 8f78ed73f8020b7e54883d17dbf26ba34d1249a1c34d6c3963f456fac951978f
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 utilizes XFA forms, a known vector for exploits. ClamAV detections indicate a malicious exploit payload. While no scripts were directly readable, the presence of an embedded script payload and XFA form suggests the PDF is designed to execute malicious code, likely to download and run a second-stage payload. The embedded URLs are related to XFA 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
15cd7a31628769ddd2cf48dc4a1995bf3265f262b1aedb8345a46fbc512dfce5		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94820 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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