RTF malware analysis — malicious · 712a253c1d2310d3

MALICIOUS

RTF

3.61 MB

MD5: 8f9084009aa402163557fd618c78d42e SHA-1: ec135af52ce1445ee1a531066d867304dc06daa2 SHA-256: 712a253c1d2310d3b5b23ca2cdeaed71efe0f8fcc9b856e60f1819c9bc4b1161

122 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains embedded OLE objects and specifically triggers the Equation Editor vulnerability. This indicates an attempt to exploit a client execution vulnerability, likely delivered as a spearphishing attachment. The embedded object data suggests the potential for a secondary payload, but its exact nature cannot be determined from static analysis alone.

Heuristics 4

Split hex Equation Editor ProgID + OLE object critical 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 2 \objdata section(s) — embedded OLE objects
Suspicious extracted artifact info 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_off000000b9.bin` `4cf1cbc53307f766845cbdf290aafb081a367bd2adb95a51791398070952397b`	rtf-objdata-decoded	RTF \objdata at offset 0xB9	392990 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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