Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4bd95bbac1de49…

MALICIOUS

PDF

75.8 KB
MD5: 78fccd2f610dab6a5fde8d8fe843bbab SHA-1: 0f36a46bdd0418220a7e78bfe6c779044ccaf752 SHA-256: 0b4bd95bbac1de4999b3fd0ec373bb096120c028a14e3f09cf24fbaf7e33abfa
168 Risk Score

Malware Insights

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

The file is a PDF that leverages the XFA form feature to exploit CVE-2010-0188, a known vulnerability in Adobe Reader's LibTIFF processing. The embedded JavaScript, though obfuscated, is designed to execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000286.bin
96fe139d6c5e91f74242030af62b9ee92d3c95c5361a9ffacef83ff2ee420cd9
pdf-embedded-script PDF raw stream script payload at offset 0x286 76948 bytes