RTF malware analysis — malicious · 4994e0b1532ec815

MALICIOUS

RTF

2.9 KB

MD5: a32c8ab0f938fdf7f40ed96790952396 SHA-1: b8454a38017418c8f3260477fcb4b6308b3a162f SHA-256: 4994e0b1532ec815a5c842d5bd42454c2bf4e99adc0638924545230dda11bc24

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The RTF file contains OLE object data and specifically triggers critical heuristics related to Equation Editor exploitation. The \objupdate directive further indicates that the embedded OLE object is designed to be activated automatically, likely leading to the execution of a malicious payload. This points to a classic exploit delivery mechanism targeting the Equation Editor vulnerability.

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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000068.bin` `c08aa7508a92c25224ad6292c6f4afbe509f6e5ae2eddca829acbd8cc29bad6e`	rtf-objdata-decoded	RTF \objdata at offset 0x68	1357 bytes

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