RTF malware analysis — malicious · 8f76e86093d71f34

MALICIOUS

RTF

67.6 KB First seen: 2024-10-01

MD5: c9ac55d64a51738b57f065449c7e3911 SHA-1: 7b9dd5b4e76e99d711b0fe11582e6ff06d9ca830 SHA-256: 8f76e86093d71f34c2e6f824984034185964f3d15c28df1b61adf5165fbb212e

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1204.002 User Execution: Malicious File

The sample is an RTF document that contains OLE object data and specifically triggers heuristics related to the Equation Editor vulnerability and OLE object activation. This indicates a likely exploit attempt to gain code execution. The presence of these indicators strongly suggests the document is designed to exploit this vulnerability to download and execute a secondary payload, although no specific payload or download URL was directly extracted.

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_off00001ae5.bin` `5b372636c5261cff6d5f4ac5fa02526e65564761418a7d81fd0566dc380dcd2f`	rtf-objdata-decoded	RTF \objdata at offset 0x1AE5	1560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.