Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 cf5ac613b3df08e3…

MALICIOUS

RTF / .DOC

20.8 KB
MD5: c6721d54e147e8ca5a4a8a510ebaee81 SHA-1: e4f0461b5d8969d2d56f18212126f7605c189a0a SHA-256: cf5ac613b3df08e3f0abc939683150e01ad129beff715ecf621973ee6ec63043
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains embedded OLE object data, specifically triggering heuristics related to Equation Editor vulnerabilities and OLE object activation. This strongly suggests an exploit targeting the Equation Editor component, likely delivered via a phishing attachment, to achieve arbitrary code execution.

Heuristics 4

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • 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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001924.bin
61f6485f1829f8827e012bc2118564cd9100ef66b698140deca272a475ac8d6c
rtf-objdata-decoded RTF \objdata at offset 0x1924 4159 bytes