Malicious PDF — malware analysis report

Static analysis result for SHA-256 5365098f7f053dc4…

MALICIOUS

PDF

104.0 KB
MD5: 74d1bea69867c67575e9472fa14c4855 SHA-1: 4845b4e48b3bf97d8d36623d72e3f66cdcba0be4 SHA-256: 5365098f7f053dc447aec26ced1fe09e4369ab652a8d63ca7274a536ceba731c
248 Risk Score

Malware Insights

The PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. Heuristics indicate the presence of exploit code and embedded scripts designed to trigger this vulnerability. The ClamAV detection 'Pdf.Exploit.Agent-6136306-0' further confirms its malicious nature. The embedded URLs, while not directly malicious, are part of the XFA structure.

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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_0000023d.bin
8ba82e0f6c2c2406a1d229d7d2e05d3a1883cf723c4b13f806e16bb88897a446		 pdf-embedded-script PDF raw stream script payload at offset 0x23D 105777 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36370
Obfuscation or payload: unlikely

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