Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 9932116b510401de…

MALICIOUS

RTF / .DOC

957.3 KB Created: 2019-09-17 13:59:00
MD5: 0d1f1658ad83475a2a3ba248f22b511d SHA-1: 47f8a624486c5b3e689de2613ff2f25fedba8060 SHA-256: 9932116b510401de52801ebac79b9e4dac52e3389415c02fb8d861ec39a8156d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The file is an RTF document containing an embedded OLE object that exploits CVE-2017-8759 via Equation Editor. This vulnerability allows for arbitrary code execution, indicating the document is designed to deliver a malicious payload. The presence of RTF_OBJDATA and RTF_OBJUPDATE heuristics further supports the exploitation of embedded objects for malicious purposes.

Heuristics 6

  • 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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \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 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000eb140.bin
14735b1b27fb3b0fff88a5affd00c87bb919d45c055943b618bebd8497b277c2		 rtf-objdata-decoded RTF \objdata at offset 0xEB140 3739 bytes

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