RTF / .DOC malware analysis — malicious · 46bf51d5d0481317

MALICIOUS

RTF / .DOC

58.9 KB

MD5: f7a2fc03e398b3d67f6dee56c7121bee SHA-1: 229bab20444365fcb9f6228642bc26cf17ccd1c4 SHA-256: 46bf51d5d0481317afb3bd1dfee25d8ecf92d85fdd1529f9b780dd09b5e5fbef

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains multiple indicators of exploitation targeting the Equation Editor (RTF_EQUATION_EDITOR, RTF_OBJAUTLINK, RTF_OBJUPDATE). This technique is commonly used to deliver malware by embedding malicious OLE objects that, when activated, execute code. The presence of an embedded OLE object (objdata_00_off00000044.bin) further supports this. The primary attack vector is likely a spearphishing attachment, leading to remote code execution.

Heuristics 5

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.
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
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_off00000044.bin` `44817e7e957feca930b23a0d44b737f5dd962670c11975651ef50f1d0617af3d`	rtf-objdata-decoded	RTF \objdata at offset 0x44	30067 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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