Malicious RTF — malware analysis report

Static analysis result for SHA-256 d2bc2b6655a2bbff…

MALICIOUS

RTF

149.6 KB Created: 2017-08-04 02:39:00 First seen: 2017-08-08
MD5: 46e80d49764a4e0807e67101d4c60720 SHA-1: 8cfd77c30b2a4edc754a83cf8e8d4cc2ebe32aa1 SHA-256: d2bc2b6655a2bbffbdc9187664f7880c1f5c59f15dba5aa399bce40b9b0797f3
302 Risk Score

Malware Insights

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

The RTF document contains embedded OLE objects and exploits CVE-2017-0199, which is a known vulnerability for remote URL moniker exploitation. The heuristic firings and the presence of the target URL indicate that the file attempts to download and execute a malicious payload from 'http://www.thyssenkrupp-marinesystems.org/templater.doc'. The document body itself appears to be benign corporate news, suggesting the malicious content is entirely within the embedded OLE objects.

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 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://usetermassembly/dealbuilder_live/DealBuilderNET/dealbuilder.aspx In RTF body
    • http://www.thyssenkrupp-steel.comIn RTF body
    • https://engineered.thyssenkrupp.com}{In RTF body
    • http://www.thyssenkrupp-marinesystems.org/templater.docIn RTF body
    • https://engineered.thyssenkrupp.comIn RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body
    • https://www.microsoft.com/en-us/download/details������������������������������������������������������������������In RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00016134.bin rtf-objdata-decoded RTF \objdata at offset 0x16134 6096 bytes
SHA-256: 32f8a843cace3439e28a0887c5107057fb987d035bf27c95c2e46e037179f088
objdata_01_off0001d442.bin rtf-objdata-decoded RTF \objdata at offset 0x1D442 6112 bytes
SHA-256: 2b5832dc947336105e6792436de737f811e2bd3b80b73462fbbab1e9c16656bd

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