RTF malware analysis — malicious · 140ee2b8d6fba552

MALICIOUS

RTF

12.0 KB

MD5: 3c9b171aa4191384845ffc13021f3a7f SHA-1: 0acd262c9aad61b328b4d37a3460ba41630ef3a0 SHA-256: 140ee2b8d6fba55259d70bab833fbae1924c7426bb8ddc79aaa5088435281872

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object, specifically targeting the Equation Editor vulnerability. This technique is commonly used to achieve arbitrary code execution. While no scripts were directly extracted, the presence of the Equation Editor exploit strongly suggests the document's intent is to download and execute a secondary payload, aligning with common malware delivery mechanisms.

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_off000018c3.bin` `eb20b342c296d7c831b35b2d65048566b5e5090d8c3bfad1dcd8f6bd48b894cc`	rtf-objdata-decoded	RTF \objdata at offset 0x18C3	1858 bytes

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