RTF malware analysis — malicious · e1afcc777188fe77

MALICIOUS

RTF

4.2 KB First seen: 2020-02-04

MD5: 401945e6ab6c762f7122abe30601c644 SHA-1: 20c9cc0bdcf5b801691130e1cb038e9f5b76bd15 SHA-256: e1afcc777188fe77ecbce2e419680e96d1349f766d5ad97d7a51df8e9568a81a

140 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers heuristics for a split hex Equation Editor ProgID and OLE object activation. This indicates the file is designed to exploit a vulnerability in the Equation Editor component, likely leading to arbitrary code execution. No specific family could be identified from the available evidence.

Heuristics 4

Split hex Equation Editor ProgID + OLE object critical CVE likely RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\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
Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000e1.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xE1	2025 bytes
SHA-256: `8557e3b8dde55975cf59a1d603c17809bd204a3e041636edfad19c9d88bf2de1`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

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