Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca57341d0019340…

MALICIOUS

PDF

16.3 KB
MD5: fe1e5e1dbcc4ee291e05ceb46e3c6f05 SHA-1: 6979c6ef97b0a77debaec7a502da6c46b60f0375 SHA-256: 6ca57341d00193405fe0b596f8cf443d9b9bedb7e19776d2f2c08e8d60f3dcd5
168 Risk Score

Malware Insights

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

The sample is a PDF file that contains an embedded XFA form, which is known to be vulnerable to CVE-2010-0188. The embedded script, which appears to be JavaScript, is likely responsible for triggering this exploit. The script's content is heavily obfuscated and truncated, making it difficult to determine its exact function, but it is highly probable that it downloads and executes a second-stage 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
6e38eccbf98d138ec233f3fcaae1753148f4ec7e656ff9cee5ee4a1089d7e905
pdf-embedded-script PDF raw stream script payload at offset 0x359 15917 bytes