Malicious PDF — malware analysis report

Static analysis result for SHA-256 952200c3834f3e17…

MALICIOUS

PDF

12.2 KB
MD5: 50ce0e32ac2885da6a8e6bb7a3acd7a3 SHA-1: 12e0be431e98967e7d9c24900ec4b10913e4a978 SHA-256: 952200c3834f3e17a3b8dbed4c8bed80fa1333ce5e3fc138f66a4f8a84ad52e1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript

The PDF file contains XFA (XML Forms Architecture) which is known to be susceptible to heap spray exploits. Heuristics indicate the presence of XFA JavaScript heap-spray exploit code and an embedded script payload. ClamAV detection confirms this as Pdf.Exploit.Dropped-78. The embedded file artifact suggests a secondary payload is likely dropped.

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
e75f00879166099c1ea0f854a0829b15d243d9734d3b15e06a9fdaa0ddc75372		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11763 bytes

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