Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a77c23f1df9239…

MALICIOUS

PDF

12.7 KB
MD5: 33936d679e04b1fe786bf4c890d9085f SHA-1: 6d74a0ff1d2d51cdb561295624be3a241eef81a7 SHA-256: 66a77c23f1df9239bf18bd9e53c3c53dc44502b3ecc583e5ba0975b87a995e83
168 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to the critical heuristic firing for CVE-2010-0188, indicating an exploit for Adobe Reader. The embedded XFA form and script payload further support this, suggesting the script is designed to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly corroborate the malicious nature of the file.

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
6a7165553f2f7587e932231bef48e2e87f070fe50fcda138c17734556f3d0ff0
pdf-embedded-script PDF raw stream script payload at offset 0x384 12276 bytes