Malicious PDF — malware analysis report

Static analysis result for SHA-256 1653fb34eb73c298…

MALICIOUS

PDF

12.7 KB
MD5: cfc18d94ea55a3b73d9df81bbe984d97 SHA-1: 7bff8aeaa1b1fe20de9e2c8b65e7fe5d593a28ea SHA-256: 1653fb34eb73c298ddf365a6080102d11ed2195bc26505a7cf45e3c93f82128d
168 Risk Score

Malware Insights

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

The sample is a PDF file that exploits the CVE-2010-0188 vulnerability in Adobe Reader's LibTIFF component. Embedded JavaScript within the XFA form is likely responsible for executing the exploit. The ML classifier and ClamAV detection strongly indicate malicious intent, and the embedded script's complexity suggests it's designed to download and execute a secondary payload.

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_00000359.bin
6f6e72baf057e7c54ae21b1a94711b7ff6199ac5792c9733de068874da5cfe56
pdf-embedded-script PDF raw stream script payload at offset 0x359 12281 bytes