RTF / .DOC malware analysis — malicious · 2f616244b8e95414

MALICIOUS

RTF / .DOC

381.6 KB

MD5: 10ce4cb3813669f8d3fa907b95281f46 SHA-1: 62a5fcac8ebcc6ece52b333da3f84903e9feb123 SHA-256: 2f616244b8e9541474f9e2e8fd056886f0f0692cf31751ff2d1dc2aba2cad8a4

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains an embedded OLE object that is automatically linked and updated, specifically targeting the Equation Editor vulnerability (CVE-2017-11882). This indicates the file is designed to exploit this vulnerability to execute arbitrary code upon opening. The presence of OLE object data and the specific RTF heuristics strongly suggest a malicious intent to deliver a payload.

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_off00000048.bin` `96189fee1bba3e6db81d0afcc92441e74888d258184502688e00a3fd4e57b937`	rtf-objdata-decoded	RTF \objdata at offset 0x48	195256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

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