RTF / .DOC malware analysis — malicious · 2f85c41ee13d69e6

MALICIOUS

RTF / .DOC

372.5 KB

MD5: 13a7436f019185b4d0295330e80c5d7a SHA-1: feb17b38763d9619e80d6742978d25a30c95f2f6 SHA-256: 2f85c41ee13d69e68454d97153252e8ba9a3a0e85573427eac0600d41fa6824d

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 leverages the Equation Editor vulnerability. This exploit is designed to decode and execute a Portable Executable (PE) payload, indicating a delivery mechanism for further malicious activity. The presence of RTF_OBJDATA, RTF_OBJAUTLINK, and RTF_EQUATION_EDITOR heuristics strongly suggests this attack vector.

Heuristics 5

Decoded Equation Editor payload + PE critical RTF_EQUATION_EDITOR

RTF decodes to an Equation Editor ProgID adjacent to OLE activation and the same decoded object stream contains embedded PE bytes. This matches the Equation Editor exploit surface used by CVE-2017-11882 / CVE-2018-0802 documents, while requiring payload evidence to avoid flagging benign Equation references.
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_off00000060.bin` `6e87bd826feb102f3442ceb6dfcecf7bedba34a31274734ea3b5e2f0034bc58e`	rtf-objdata-decoded	RTF \objdata at offset 0x60	190570 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.