Malicious PDF — malware analysis report

Static analysis result for SHA-256 3532001172ce7dd8…

MALICIOUS

PDF

12.0 KB
MD5: 50e963e9973133b3fb6b832b88cbadb3 SHA-1: 6f1dc19233c81e29f02183417f1c78424a1b93dc SHA-256: 3532001172ce7dd8109de5cbe3cd47d743970a12114037db89215107dedbc762
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.007 JavaScript/VBScript

The PDF file contains XFA form elements which are known to be vulnerable to heap spray attacks. The heuristic firings indicate the presence of exploit code and embedded script payloads designed to be triggered by these XFA forms. ClamAV detection confirms this as a malicious exploit. The embedded file artifact is likely the delivered payload.

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
1fc0ed5add80c318584a1b83717bfacd98c9f5c1993819368cf3aeb2b66548a2		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11516 bytes

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