RTF malware analysis — malicious · dc446b7769dcf1ca

MALICIOUS

RTF

13.1 KB First seen: 2019-12-10

MD5: 7ca77c4ed3ab077d266e1179dda8ea99 SHA-1: 05c2db8e4fea8a1909bf89b96bbb4137b92ab790 SHA-256: dc446b7769dcf1ca9511830e5e6ca8a2b0b1a2ad0f4f770b7a0dd9af0a685a6b

220 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 Equation Editor exploitation (CVE-2017-11882). This indicates the file is designed to exploit a vulnerability in the Equation Editor component to achieve code execution. The ClamAV detection further confirms the presence of a known exploit. The attack pattern is consistent with a malicious document delivered as a spearphishing attachment.

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
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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_off000013d5.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x13D5	4153 bytes
SHA-256: `9bfaf4a7a6912d7fe063b212aabfc231dcc161045ddf3b3f75d517a77195a14a`

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