Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a83885a0e5ea899…

MALICIOUS

PDF

12.6 KB
MD5: 708b04123c930c26790fca13962cfb10 SHA-1: cd2f402bad5b6b26e74dc6e8c7a74fb23c2fa994 SHA-256: 7a83885a0e5ea89943652e7c936389e24cc02ec4f78126b021c27e6fd6cfb146
168 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript within an XFA form, which is known to be exploited by CVE-2010-0188. The embedded script is designed to download and execute a second-stage payload, as indicated by the heuristic firings and the nature of the script content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
5e055199152f7592deb63529b76165118b1769cedba0fbf858c603b71d92b691
pdf-embedded-script PDF raw stream script payload at offset 0x359 12185 bytes