Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a39c5718557d28…

MALICIOUS

PDF

12.7 KB
MD5: 88e61c051c0673d580ca39110dda842a SHA-1: c0b6345067d7562a3ecb7cbe12b3be8b595401a1 SHA-256: 66a39c5718557d282b0cf28db8569086d36301ac24666c79f26d5a60ca1b9a8f
208 Risk Score

Malware Insights

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

This PDF file exploits the CVE-2010-0188 vulnerability in Adobe Reader, leveraging XFA forms to execute embedded JavaScript. The script's content is heavily obfuscated but appears designed to download and execute a secondary payload, indicated by the ML_NYX_PDF_MALICIOUS and ClamAV detections. The embedded URL was confirmed benign and is not considered a primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • 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.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
5f5678f43f647b977413a3cb2d97a24684fbee7146a4c93fbcb0f7a0494ee463		 pdf-embedded-script PDF raw stream script payload at offset 0x359 12312 bytes

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