Malicious PDF — malware analysis report

Static analysis result for SHA-256 2275f8169ca4df62…

MALICIOUS

PDF

12.0 KB
MD5: 8eac18404d38422c2e47e098d6b2f926 SHA-1: 12cd4b9718690364bf911c8305f47bb7e7ade048 SHA-256: 2275f8169ca4df62afb42a63cfcb095ae51661d4313f5ee1c2038d96dad37560
196 Risk Score

Malware Insights

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

The PDF file contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Heuristics indicate the presence of XFA heap spray exploit code and risky executable script within the form. This suggests the file is designed to leverage a PDF vulnerability to execute arbitrary code, likely leading to the download or execution of a secondary payload. The ClamAV detection 'Pdf.Exploit.Dropped-78' further supports this assessment.

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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
233c6d8abf2f4ac4d7d4889684f5f46e17bc24d6c1ab0b639428bc180ca038b4		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11537 bytes

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