Malicious RTF — malware analysis report

Static analysis result for SHA-256 07d7f8e4cd435b6d…

MALICIOUS

RTF

43.3 KB
MD5: b50f5518e2a93b63530727ca0935abdf SHA-1: f21007063a27daa6230ee04d55ed303b6a116fca SHA-256: 07d7f8e4cd435b6d3987fcfddbe0aa69d8e853d997d34b9f35e90425e4d59ab7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains embedded OLE objects and specifically triggers the Equation Editor vulnerability, as indicated by the RTF_EQUATION_EDITOR and RTF_OBJUPDATE heuristics. This exploit is designed to execute arbitrary code, likely leading to the download and execution of a secondary payload. No document body or script content was available for further analysis.

Heuristics 3

  • Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR
    RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
  • \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_off00000a26.bin
7969734e0fc9a3b9be0fe8e058b90ee019012e62f96100a3c46bbeaa0be7c226		 rtf-objdata-decoded RTF \objdata at offset 0xA26 2296 bytes

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