Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 1c09e02de0a74213…

MALICIOUS

RTF / .DOC

674.2 KB Created: 2019-09-17 13:59:00
MD5: 58b66751a7ee34080cbff183fbffb809 SHA-1: 474c6a239f01334316d5c2531bbf7e9559cd3731 SHA-256: 1c09e02de0a7421389254229e407ce4b14b326d4ac5b77cea375b96ce419a5da
240 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains embedded OLE objects and specifically targets the Equation Editor with CVE-2017-8759, indicating an attempt to exploit a known vulnerability for code execution. The presence of `RTF_OBJUPDATE` suggests that the embedded object is designed to be activated automatically. The `SE_PASSWORD_ARCHIVE_LURE` heuristic indicates a common social engineering tactic to trick users into opening password-protected archives, which often contain malware.

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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_off000a208f.bin
e53a7404c8f21dad6cb04873235feef54d808e5a533fc5c448841b704dea0c38		 rtf-objdata-decoded RTF \objdata at offset 0xA208F 3739 bytes

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