Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c4042d8ecb3c49…

MALICIOUS

PDF

12.7 KB
MD5: 664f1777c1ae70bb9ba4bfb7fa9ca425 SHA-1: 3765c858cb7000d5b814a783077fbd6e2c61eabb SHA-256: 96c4042d8ecb3c493a4552a56890c168945b56cfc9930000a4179d0fa9aa9cd1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter

The PDF document contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Critical heuristics indicate the presence of XFA JavaScript heap spray exploit code and risky executable script within an embedded stream. This suggests the document is designed to deliver a malicious payload by leveraging these vulnerabilities. The ClamAV detection further confirms its malicious nature.

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
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
2488b30db42e39794bf6d0c92210fa7eacc8bd0b48d71d71bdf623b69552c368		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12237 bytes

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