RTF malware analysis — malicious · 4e814494e9adfe62

MALICIOUS

RTF

8.4 KB First seen: 2021-07-07

MD5: 0e517f437b760b81f84ef020cda4aac3 SHA-1: 980f4e1b59fa001fac683b8eefbd952070fcae21 SHA-256: 4e814494e9adfe62be804f77f95d703adb93436286441739a0730b9317b7f3be

300 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 targets the Equation Editor, indicating an exploit for CVE-2018-0802. This vulnerability allows for the execution of arbitrary code when the embedded object is activated, likely delivered via spearphishing.

Heuristics 7

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: Rtf.Exploit.CVE_2018_0802-6825822-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6825822-0
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.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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_off00000100.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x100	3471 bytes
SHA-256: `cf27256a0fd0280379193aee265d6c2bac1d84b5e699fb064db9f8756677864a`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): cmd.exe /c calc.exe

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