Malicious PDF — malware analysis report

Static analysis result for SHA-256 e890bb6c0c3a65a6…

MALICIOUS

PDF

12.8 KB
MD5: f757170766299499be5af5b1b1a715e6 SHA-1: 59d454a173776fba5dd6de39a859e11cb58f0eeb SHA-256: e890bb6c0c3a65a688680fa2a23b9f030a1290032c22c6991584d3c46f5a35d0
226 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 critical heuristic PDF_XFA_HEAP_SPRAY indicates that exploit code is present within an XFA JavaScript stream. This code is likely designed to download and execute a second-stage payload, as suggested by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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
b4a3ca96f509df816f4e75aa44e4b38a22d89c9255be90898ad1f477d1911126		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12367 bytes

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