Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6c0f06d9c7d42f…

MALICIOUS

PDF

78.7 KB
MD5: b0f58bf3f99476f23fbf857debf52b63 SHA-1: 8244b7d2666eecd87c99bc18fc2301d2e8213767 SHA-256: fb6c0f06d9c7d42f1e751cb6b8152850028ab9125e7fb61c2bd680de8cb6f218
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF document that exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The critical heuristic firing indicates that a decoded XFA payload was found, and a high-confidence heuristic confirms the presence of executable script within the XFA form. This script is likely responsible for downloading and executing a second-stage payload, although the specific script content was truncated and could not be fully analyzed. The embedded file further suggests the delivery of additional malicious components.

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
e055bdfae50b8df1936a089efec5d16f9dd766f383efaa52e37117d3c09d833f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 79796 bytes

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