Malicious PDF — malware analysis report

Static analysis result for SHA-256 865bfecbd4a4f2bc…

MALICIOUS

PDF

16.2 KB
MD5: 8ab3819f8980a0d2748b93068c040592 SHA-1: 2cca39c2a1c1cfdad5a5937580b7f2e927459716 SHA-256: 865bfecbd4a4f2bcf29b1f5ad358715ea5d94de241db1e2177cf98fec5bdacdd
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 and triggers the CVE-2010-0188 exploit. This exploit is known to target Adobe Reader and is used for client-side code execution. The embedded script, although truncated, appears to be JavaScript and likely facilitates the download and execution of a secondary payload, consistent with exploit-driven malware delivery.

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
366d5a649603c3cd6c8328a946cc14bdc8b90c9442390ba12f59d767d1515a6f
pdf-embedded-script PDF raw stream script payload at offset 0x359 15901 bytes