Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74d98a48cb0b12f…

MALICIOUS

PDF

13.0 KB
MD5: e0305f1622d95c877499834c8a92ef47 SHA-1: 1b4453a3336644030565a750487fdf44c49e23fe SHA-256: f74d98a48cb0b12fb2e76a6f9d9427b59d0ae0335296744b941f4e47f1ea0aa9
128 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The ML classifier strongly indicates maliciousness. The embedded file and script payload markers suggest the PDF is designed to download and execute a second-stage payload. The document body contains obfuscated JavaScript-like code that appears to be constructing strings for execution, likely to facilitate the download and execution of further malicious content.

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 script payload in PDF stream medium 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 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 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_obj0009.bin
25bd91d0d926ba39970c733f60d63498371c917a81987f13d74789e9c98dfe3d		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0xD5 12554 bytes

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