RTF malware analysis — malicious · edd08eab5b1a7403

MALICIOUS

RTF

76.8 KB First seen: 2024-08-01

MD5: ca2e6b4cf62ef944abfed82240d9f7fa SHA-1: 0420a676b677439e724f50c4f0b10112a6fca031 SHA-256: edd08eab5b1a7403c18ae7a7f8f3d757e85a856121c4e0b83ddd043596ed6cd4

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 containing an embedded OLE object that exploits the Equation Editor vulnerability. The presence of `RTF_EQUATION_EDITOR` and `RTF_OBJUPDATE` heuristics strongly indicates exploitation of CVE-2017-11882. This vulnerability allows for arbitrary code execution, typically used to download and execute a second-stage payload.

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_off000011a4.bin` `05f6772b8dd45dd30cec32b06db43cef1b1e0c3d5327ae29f63f5c4d7c448054`	rtf-objdata-decoded	RTF \objdata at offset 0x11A4	1645 bytes

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