Malicious PDF — malware analysis report

Static analysis result for SHA-256 9393a296a20345b7…

MALICIOUS

PDF

114.8 KB
MD5: e43f6a8463a091fe595443dfd788949e SHA-1: 3abfcf71ef4906876a9722428ee6651632415953 SHA-256: 9393a296a20345b7d09407007d62324dd7b65ebc490e7cd60e22bf892bbb37cd
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 Service Execution: JavaScript T1204.002 Malicious File: Malicious File

This PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. The embedded JavaScript, identified by multiple heuristics, is designed to trigger this exploit. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a second-stage payload. The specific exploit code and heap spray technique are indicative of a PDF-based exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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_pdf_script_0000023c.bin
fae70c429b1908f876d2777109e393814ddd7b09cf3162c18bf44236f1b7ea83		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 116824 bytes

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