Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f759a7beb46bb1b…

MALICIOUS

PDF

110.7 KB
MD5: 4287fbc422641d580b50ea36b8deaf62 SHA-1: f9480ab45366d2986d06d54a599a47b2641ab29d SHA-256: 2f759a7beb46bb1bce4d786cf94833e7785c1d43e9ed003a36074de081531484
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The critical heuristic indicates a matched decoded XFA payload, suggesting the PDF is designed to deliver an exploit. The presence of embedded script payloads and XFA forms with executable scripts further supports this. The script content, though obfuscated, appears to be JavaScript attempting to download and execute a secondary payload, as indicated by the string concatenation for 'http' and the use of 'eval'.

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
0f8c5f564fd064cde7862921af3654522454b898287e1eb289567a26a7f196fe		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 112590 bytes

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