Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ed413bc4785a54…

MALICIOUS

PDF

12.3 KB
MD5: 9c9baa43fb313d64d27e269ab79802b4 SHA-1: 075f55b5e5d91d89ec043e5ed874a34a0f742379 SHA-256: d7ed413bc4785a545d551a64c0f7995aae1d0e8ca596aa6dee3824483b9e4649
226 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: 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 a PDF_XFA_HEAP_SPRAY and PDF_XFA_SCRIPT, suggesting the document contains exploit code designed to spray the heap and execute embedded script. This script likely serves as a payload delivery mechanism, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and the ClamAV detection of 'Pdf.Exploit.Dropped-78'. The ML classifier also strongly flags this as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
4e2cad19c51dfdbab40c0fded59c3d7515e61550c4d237da0be2f17e8153ec43		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11841 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.