Malicious PDF — malware analysis report

Static analysis result for SHA-256 d406868794d703a2…

MALICIOUS

PDF

99.8 KB
MD5: b731b3beb15c8c6f19c7fca0992c82d5 SHA-1: 49e8fd4f806460bad4110ad797a8c8a6c1a4b6b1 SHA-256: d406868794d703a2791e786af77845e0fbf82ffa7196bb13400f6e84c0b38e20
136 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF XFA image processing. The PDF contains embedded script content within an XFA form, which is designed to trigger the exploit. The embedded script is likely responsible for downloading and executing a second-stage payload, although the exact nature of the payload cannot be determined from the provided evidence. The embedded URLs are related to XFA specifications and are not considered malicious.

Heuristics 6

  • 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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • 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_obj0008.bin
f45ac2b88377c4ee39204ea7c18913ec6fbb41dde4dd01effb6f9a8c4c588e96		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101471 bytes

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