Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bd9726b266bf73…

MALICIOUS

PDF

99.5 KB
MD5: a44edf7652ceaeb7fe2e9def970ad8b3 SHA-1: 891f4e5abba9b149c441ab0839309d9aacc52799 SHA-256: 94bd9726b266bf73066af95d127a5d1c4bb8dc06b8d5f9800f80c1382c172f9d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. This exploit is capable of executing arbitrary code, suggesting the PDF is a delivery mechanism for a secondary payload. The presence of embedded script payloads within the XFA form further supports this, indicating an attempt to download and execute malicious content. The embedded URLs, while not directly malicious in reputation, are part of the XFA structure and could be used in the exploit chain.

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
ac3bba5c0851206bd77355a619744655978939137f5416ea1c63aa9ccc5e94ae		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101152 bytes

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