Malicious PDF — malware analysis report

Static analysis result for SHA-256 157efe0e65c0560b…

MALICIOUS

PDF

99.8 KB
MD5: 90ac948c9feaead4818d8b9332c20a8d SHA-1: 67c95c37466414abb982d2bc9b1243d761e4a22d SHA-256: 157efe0e65c0560bc316b11d18f7b83b148abab23806adbe387704cd65df316a
116 Risk Score

Malware Insights

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

The file is a PDF that leverages the CVE-2010-0188 vulnerability, which is known to be used for client-side exploitation. The embedded XFA form and script payload indicate an attempt to execute malicious code. While no specific family is identified, the exploit's nature suggests it's a downloader for further stages.

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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
7813df7636369361849e1b7b0bcacae79fcbe7c5ac7335a822d3db2e8cc384bb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101411 bytes