Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bff222bb9587020…

MALICIOUS

PDF

12.6 KB
MD5: 4e1c0bc1e05e6a4f905aa27ec0966e85 SHA-1: d33e98e1d8fb771c2240245c51e1e4a26fa54e93 SHA-256: 5bff222bb95870208547ceaabfdf2cf8ef260fa1bda0d930aa0ed2ec7666a138
168 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The embedded JavaScript attempts to download and execute a second-stage payload, indicated by the heuristic firings and the nature of the script. The script's obfuscated string concatenation and the exploit itself strongly suggest 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
9aa3c6075119e1df6991074ee2dd57c7f2f1ea113e62928c87f9eeac14a9b046
pdf-embedded-script PDF raw stream script payload at offset 0x359 12159 bytes