Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ceba616e1f36b81…

MALICIOUS

PDF

12.8 KB
MD5: 67e4d77aad475988bc51af75df061ab7 SHA-1: 054c254172c8580d3043a797358afa5d8ecb35d7 SHA-256: 3ceba616e1f36b8115bd3bd3f135e5efc1842fee3bfc852705c9c0fd67ddb12f
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 forms which are known to be vulnerable to heap spray attacks. The critical heuristic PDF_XFA_HEAP_SPRAY indicates that exploit code is present and triggered by an XFA event. This suggests the document is designed to download and execute a malicious payload. The ClamAV detection further confirms its malicious nature. No specific family could be identified.

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
31ab209a6ebd37dfc9d8d4e42ee10c5b6d88333206a40e7f2ec8ba274b704e12		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12321 bytes

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