Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39ce955c45f2ad0…

MALICIOUS

PDF

99.8 KB
MD5: 12c55244f4c81432330f701e822014ef SHA-1: 5c1a585e1b7ea8c6dd764d7747d2faf0b0c5fc6d SHA-256: d39ce955c45f2ad04d39ce971d03e8c6834ac5c4bd78faf7e2f55715c474b432
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The critical heuristic firing indicates the exploitation of this specific CVE. Additionally, the PDF contains an embedded script payload within an XFA form, suggesting it's designed to download and execute a second-stage payload. The embedded file is likely the exploit or the initial payload.

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
bf901ac74a7a7974d53b315d71d6a25dda3387be5b4c6d637b0603b0c68f68c1		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101489 bytes

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