Malicious PDF — malware analysis report

Static analysis result for SHA-256 71fd9b908bd258fb…

MALICIOUS

PDF

99.6 KB
MD5: 148f6e99376baf6f594d6a94c6bcf604 SHA-1: 249a9a8237325abaf93011a422151188c1db41b1 SHA-256: 71fd9b908bd258fbc7720f0d2370cd098f011ded2541e39ac39c0ec01bd1c93e
116 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by an ML classifier and heuristics. It exploits CVE-2010-0108, a known vulnerability in Adobe Reader related to XFA forms. The embedded script payload, although obfuscated, is indicative of an exploit designed to download and execute a secondary stage. The benign URLs present are likely decoys or part of the XFA form structure.

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
32f2e4ac033582ed8f5121fde353b90a899dfcf4b7c6ab1da9a86986a633b3e0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101243 bytes

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