Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f877d5f420d7f65…

MALICIOUS

PDF

99.6 KB
MD5: 663132a4b7fd07c3587882ccee25d943 SHA-1: 22186da7c72737df5b7cd498f817e944b76432a0 SHA-256: 9f877d5f420d7f65dd1f12a92172cd4a43ae5afb2ead7f7b3ce66b6db9c91efb
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 XFA forms. The critical heuristic indicates a matched decoded XFA payload from a raw stream, suggesting the execution of malicious code. The presence of embedded script payloads and XFA forms with executable scripts further supports this. The embedded URLs are likely related to the XFA template or data, but their reputation is unknown or benign, so they are not considered high-priority IOCs.

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
d51895b7e6176dd43bd858ddc4813dd031dc5d09b5819f2b7b88eece6ad99844		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101254 bytes

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