Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e934a05bc9b3f3f…

MALICIOUS

PDF

12.9 KB
MD5: 0e24d38adc791529565afe905d60b733 SHA-1: 17eea230b111d9f9649a60c115bb6b3819ecd695 SHA-256: 1e934a05bc9b3f3fa76ef0995a127660b5149ea901cde1a67287aebb29172883
226 Risk Score

Malware Insights

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

The PDF document contains XFA (XML Forms Architecture) which is known to be susceptible to heap spray exploits. Heuristics indicate the presence of heap spray exploit code and risky executable script within an XFA form. The embedded file and ClamAV detection further confirm its malicious nature. The primary attack vector appears to be leveraging a vulnerability in the PDF reader's handling of XFA content to execute arbitrary code.

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.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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
8d4feb9659f863963184edcc0fa241d43ef0047f9a9884d068d4e61917119859		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12473 bytes

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