RTF malware analysis — malicious · 14cfd6340c189704

MALICIOUS

RTF

236.3 KB

MD5: 4894c7f281ca84866cdafa19c52c734d SHA-1: 23dfaf317b8a82107ef2f2906d37a0aa8b85d828 SHA-256: 14cfd6340c189704a9d65b0d3c9aa8472119d30987296c1d04bc225ea0f9891d

200 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is an RTF document containing embedded OLE objects, specifically triggering critical heuristics for Equation Editor vulnerabilities and OLE activation. ClamAV identifies the file as Rtf.Malware.Agent-9903827-0, indicating it's a known malware dropper. The presence of the Equation Editor CLSID strongly suggests exploitation for client execution, likely delivered via spearphishing.

Heuristics 5

Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
ClamAV: Rtf.Malware.Agent-9903827-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Malware.Agent-9903827-0
\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
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_off00001aac.bin` `6d2e78a26407d2531803ecdde3c6d8664a5a1f1b917dcfc45beba6ffc050b143`	rtf-objdata-decoded	RTF \objdata at offset 0x1AAC	4173 bytes

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