Malicious RTF — malware analysis report

Static analysis result for SHA-256 c38652179df770d3…

MALICIOUS

RTF

91.0 KB Created: 2017-11-07 06:37:00 First seen: 2017-11-13
MD5: e8a7cb505b6a4e522d50ba627603717a SHA-1: 273083eae278648274423b495ee05a9461147aff SHA-256: c38652179df770d3d10fb84d129e25f534abb8b8fa01c074bf6655cea4948caa
282 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains critical heuristics for CVE-2017-0199 and CVE-2017-8759, indicating exploitation of vulnerabilities related to remote URL monikers and SOAP monikers. The embedded URL http://103.194.170.48/bbs.doc is likely the source of a secondary payload. The document also contains a lure to enable editing, a common tactic for malware droppers.

Heuristics 8

  • SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) critical CVE related CVE_2017_8759
    RTF \objdata decodes to OLE data containing the SOAP Moniker — CVE-2017-8759 (SOAP WSDL RCE) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • ClamAV: Doc.Dropper.Agent-7392144-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7392144-0
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • OLE object data medium RTF_OBJDATA
    RTF contains 2 \objdata section(s) — embedded OLE objects
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://schemas.microsof In RTF body
    • http://103.194.170.48/bbs.docIn RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002ca2.bin rtf-objdata-decoded RTF \objdata at offset 0x2CA2 13854 bytes
SHA-256: 220064f584625d84963f3479fcfe8631ccdacc4e127237f3c14c7fb2eb3ba8d0
objdata_01_off00009d02.bin rtf-objdata-decoded RTF \objdata at offset 0x9D02 8342 bytes
SHA-256: ec71ff19f62e78edf410add641bf3ba49865f56d963213e5d3b27031a7fe53cf

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