Malicious PDF — malware analysis report

Static analysis result for SHA-256 344661bf8c8641e5…

MALICIOUS

PDF

101.8 KB
MD5: e13eaa2551d11a55df48f6b07e83769c SHA-1: 85f1eb2b211a7ea1380a81e3a47ad2dd23797e11 SHA-256: 344661bf8c8641e57abe7a87952a135c18e8122e7d5a85cd36fca5f3165dded2
168 Risk Score

Malware Insights

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

The sample is a PDF document that leverages the XFA form functionality to exploit CVE-2010-0188 in Adobe Reader. The embedded script, identified as JavaScript, is likely responsible for downloading and executing a second-stage payload. ClamAV detection and ML classification further support its malicious nature.

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_00000346.bin
93ca9da8c10e96a8ede169a3c6f3f850c8ad642cf598d6d16e6af0095e9d1ebd
pdf-embedded-script PDF raw stream script payload at offset 0x346 103560 bytes