Malicious RTF — malware analysis report

Static analysis result for SHA-256 45beb208bffd5823…

MALICIOUS

RTF

2.42 MB Created: 2017-11-06 11:14:00 First seen: 2017-11-13
MD5: e5a08d79e11aed2e68d423bdb4aabf16 SHA-1: 3d137a0bd259df429da9ac5c0d512db3a01ce65c SHA-256: 45beb208bffd5823dcbe1bf9caa7d24c1c878479ac92d851e6ce46c8920ab965
302 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE objects and triggers critical heuristics for CVE-2017-0199 and CVE-2017-8759, indicating exploitation of vulnerabilities related to remote URL monikers and SOAP. The file attempts to download a payload from 'http://newsshopper.info/news/t.php?thread=0&t=h', which is a strong indicator of a downloader attack pattern.

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: Rtf.Downloader.CVE_2017-6336326-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Downloader.CVE_2017-6336326-3
  • 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.
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~2476KB of hex-encoded data inside \objdata sections — may hide a payload
  • 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.
  • 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://newsshopper.info/news/t.php?stats=send&thread=0 In RTF body
    • http://newsshopper.info/news/t.php?thread=0&t=hIn RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0025f402.bin rtf-objdata-decoded RTF \objdata at offset 0x25F402 5142 bytes
SHA-256: e1a8f6b148829199fa6e56f90d9509f7871bef5367a5fbaef977217c7ed3f590
objdata_01_off00261fd3.bin rtf-objdata-decoded RTF \objdata at offset 0x261FD3 4354 bytes
SHA-256: 308fbdadff27b1919096bdf8edabff094d1f5418e3e95cc4e13ac1fe22db13ba

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