RTF malware analysis — malicious · 4383072baba600e1

MALICIOUS

RTF

101.5 KB First seen: 2021-04-01

MD5: d97f51bd3689a9acea698109f69f5c13 SHA-1: 27104cd4af1c4bab356d32cdae53af01bfc556d1 SHA-256: 4383072baba600e19a8c19d02341dc411fbdc2da662b0f8efe844c036dddfd06

240 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object specifically identified as an Equation Editor object, triggering critical heuristics related to Equation Editor exploitation. This strongly suggests the file is designed to exploit CVE-2018-0802, a known vulnerability in Microsoft Equation Editor, to achieve arbitrary code execution. The ClamAV detection further confirms its malicious nature as Rtf.Exploit.CVE_2018_0802-6624871-1.

Heuristics 6

Equation Editor ProgID + OLE object high CVE related RTF_EQUATION_EDITOR

RTF references Equation.3 ProgID alongside \objdata — likely Equation Editor (CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798) but without the binary CLSID payload, so flagged at HIGH instead of CRITICAL.
ClamAV: Rtf.Exploit.CVE_2018_0802-6624871-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6624871-1
Equation Editor object class critical RTF_OBJCLASS_EQUATION

Object class 'equation.3' references Equation Editor
\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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000016e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x16E	9067 bytes
SHA-256: `82513c23f6a09931a429f380821a75afa8aab39fc0cb673edacfb6582f290097`

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