RTF malware analysis — malicious · cdaeeed01aeb4b8f

MALICIOUS

RTF

79.4 KB First seen: 2022-11-08

MD5: 9967fbb3f1329581a2837ff5eb6ddbae SHA-1: fb3837d1d6f087e9c7e4a5985de941cfcc2bbc74 SHA-256: cdaeeed01aeb4b8f8a314b8d035ca23119da205e55a6c28bb406f584dc0a77c4

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1204.002 Malicious File

The RTF document contains an embedded OLE object that leverages a known vulnerability in the Equation Editor component. The presence of \objupdate indicates that the embedded object is designed to be activated automatically, leading to the execution of malicious code. The objdata section likely contains the exploit code or a loader for a secondary 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_off000014dc.bin` `e9bff993a128d03402cfd153c8f144c5cb282511e9d341d3653c3eba5d2cca42`	rtf-objdata-decoded	RTF \objdata at offset 0x14DC	1732 bytes

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