Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6034764a6907a8…

MALICIOUS

PDF

12.1 KB
MD5: 980ae28ca958eae8a6d41c1d48aaaf56 SHA-1: 2d028e7ed2aabb79b0ad9ff9b79ddbede596bddf SHA-256: 6e6034764a6907a86618024de66d83250d8a27c33335b4a669ef775a57173f04
216 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. The presence of XFA JavaScript heap-spray exploit code and embedded script payloads strongly indicates an attempt to execute arbitrary code. ClamAV detection as 'Pdf.Exploit.Dropped-78' further confirms its malicious nature.

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 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 script payload in PDF stream low 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 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
3f636b2c4a381db59558fdaf8aaa14c88bbe1539a7f0a4feaf573c46af0e9402		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11656 bytes

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