Malicious PDF — malware analysis report

Static analysis result for SHA-256 786def634168bc3d…

MALICIOUS

PDF

16.2 KB
MD5: 19c36e590f221839fe7c2857c4978cde SHA-1: 9101d819b80de10e14f1363dabb4fa719f9120eb SHA-256: 786def634168bc3df7b0fb92d630953593183dc9eae580a95bc703a1c1dc5db7
168 Risk Score

Malware Insights

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

The file is a PDF that exploits the CVE-2010-0188 vulnerability in Adobe Reader's LibTIFF component. The embedded XFA script contains obfuscated JavaScript, which is likely responsible for downloading and executing a second-stage payload. The script's complexity and the critical nature of the exploit indicate a high likelihood of 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://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
0d5e84b909273da20ea46a668c9edbf2d48ab2085bdf1475f1e68ad1850ede3e
pdf-embedded-script PDF raw stream script payload at offset 0x359 15901 bytes