Malicious RTF — malware analysis report

Static analysis result for SHA-256 6abd5540b4ce72fc…

MALICIOUS

RTF

83.8 KB Created: 2017-09-08 07:03:00 First seen: 2017-09-14
MD5: 3bb6bd8495b48835a98f688a3f3cb9c3 SHA-1: b98d98b508f0f0cbf8ae701d4f9ff5e0f81ab565 SHA-256: 6abd5540b4ce72fc8b647370c2c1df7f31ed725acc41b8709382f2192a778727
302 Risk Score

Malware Insights

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

The RTF file contains critical heuristics indicating exploitation of CVE-2017-0199, which is known to leverage remote URL monikers to download and execute arbitrary content. The embedded URL http://192.168.56.103/test.rtf is highly suspicious and likely points to the secondary payload. The presence of OLE object data and automatic linking further supports the exploitation vector.

Heuristics 8

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • 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.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • 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.
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 3 \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://192.168.56.103/test.rtf In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002d72.bin rtf-objdata-decoded RTF \objdata at offset 0x2D72 2601 bytes
SHA-256: 6d84b3b3e5e333f72d242b92a014a2462b9fedc8d8bd269ba63c6595aa3bc207
objdata_01_off000063ba.bin rtf-objdata-decoded RTF \objdata at offset 0x63BA 5432 bytes
SHA-256: 1f7b93353f542b96cc60be3139228db5521fc97a3ecf7ec6c210e83998bf2d36
objdata_02_off0000ab8c.bin rtf-objdata-decoded RTF \objdata at offset 0xAB8C 6968 bytes
SHA-256: 6e4994d9120c15bbff11652deaf486f5cb96cca89b378455c73ad2fbf45bdc24

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