RTF malware analysis — malicious · 7e4650edf1b60803

MALICIOUS

RTF

4.0 KB

MD5: 5e262a3639a364ad79329da3dac94bd9 SHA-1: 8983a4544346b728a852a1a5dc47ffba9a6c59cc SHA-256: 7e4650edf1b6080343271a9914f3872dbab9b1ac0dd9919573febf4d85bb8472

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE object data and specifically triggers heuristics related to the Equation Editor vulnerability. This indicates the file is designed to exploit a known vulnerability in Microsoft Office's Equation Editor to achieve arbitrary code execution upon opening. The presence of ".objupdate" further suggests an attempt to automatically activate the embedded object, facilitating the exploit.

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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000a0.bin` `70cc011eba021c246be85fcdfd1ecd29368507e9896aee6287dc9ad003e47f39`	rtf-objdata-decoded	RTF \objdata at offset 0xA0	1833 bytes

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