RTF malware analysis — malicious · 0cc36c329b584354

MALICIOUS

RTF

9.2 KB First seen: 2019-03-10

MD5: 601ece51df28db1106fe7f1135d84f83 SHA-1: 6aa6a9a8fb20c8190eee8c935d2a7a7cd3ed3d31 SHA-256: 0cc36c329b5843547070a27bf57e39c2268f0781c4e4f5ca9d3c75e0156130a2

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers heuristics related to the Equation Editor vulnerability (CVE-2017-11882). This indicates the file is designed to exploit this known vulnerability for client-side execution. The ClamAV detection further confirms the malicious nature of the file, identifying it as Rtf.Exploit.CVE_2017_11882-6584355-1.

Heuristics 5

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\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_off0000003a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3A	4663 bytes
SHA-256: `6c6e3b0f3abe0e92b2313528e963ac43a44f11ab446a4089f00a8d06f7868323`

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