Malicious PDF — malware analysis report

Static analysis result for SHA-256 728f73710f43f3ec…

MALICIOUS

PDF

12.7 KB
MD5: 46118896c72b04290779df85681ed1db SHA-1: 29685c365c02c00aea682b9c4c9d76a423391588 SHA-256: 728f73710f43f3ec2d1460b3a531b8d4d5d8709e5083347c93ecc5d463f08dec
216 Risk Score

Malware Insights

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

This PDF file contains XFA forms with embedded JavaScript that triggers a heap spray exploit. The exploit is designed to execute arbitrary code, as indicated by the critical PDF_XFA_HEAP_SPRAY heuristic. The ML classifier and ClamAV detection strongly support the malicious nature of this file, classifying it as Pdf.Exploit.Agent-6136306-0.

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 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
4baa3f1eb7a7bc5fbcd5a9f6106cfa5cf007d475a4d39655de7017d8f4334fa7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12283 bytes

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