Malicious PDF — malware analysis report

Static analysis result for SHA-256 645ac73f792684a9…

MALICIOUS

PDF

12.8 KB
MD5: a38c0e957c9b582a46157c28579b080b SHA-1: bbcd679610242adea0e11c545d2a194bd81e05f4 SHA-256: 645ac73f792684a90abbb8e395b4f1239b1074a508538064f526ac49ccd082a4
168 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that exploits the CVE-2010-0188 vulnerability in Adobe Reader. The script is designed to download and execute a second-stage payload, indicated by the ML_NYX_PDF_MALICIOUS heuristic and ClamAV detection. The embedded script content, though obfuscated, suggests an attempt to leverage XFA forms for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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_00000384.bin
2ae970d9686ed4e35b0f43764074351757de0360b3b5522b703cc7be879c6d7f
pdf-embedded-script PDF raw stream script payload at offset 0x384 12324 bytes