RTF malware analysis — malicious · cba402a598dbd35e

MALICIOUS

RTF

4.3 KB

MD5: f20d4cb1a077ffe6a9cbffd762540af6 SHA-1: 5bcf277408fca2d9eb5fe5b94dbb90037485a517 SHA-256: cba402a598dbd35ef977b5b637558b393a66ced682cfb2213da0142977b36876

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE objects and specifically triggers the Equation Editor vulnerability. This indicates an attempt to exploit a client execution vulnerability, likely delivered as a spearphishing attachment. No specific family could be identified from the available evidence.

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.

Filename	Kind	Source	Size
`objdata_00_off000000b9.bin` `960dbb34dadb9df5253c9158abb33f6524261c55a636d3374baba36977ca3fe5`	rtf-objdata-decoded	RTF \objdata at offset 0xB9	1976 bytes

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