MALICIOUS
502
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF document contains multiple indicators of malicious activity, including OLE object data, embedded OLE objects, and excessive hex data within OLE objects. Critical heuristics identify the exploitation of CVE-2017-8759 and ClamAV detections point to the DarkKomet dropper family. The embedded OLE objects likely contain and execute a second-stage payload.
Heuristics 12
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Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOREquation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
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Ole10Native stream in RTF OLE object high RTF_OLE10NATIVE_STREAMRTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
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ClamAV: Win.Trojan.LokiBot-7077052-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Win.Trojan.LokiBot-7077052-0
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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Package object class high RTF_OBJCLASS_PACKAGEOLE Package object — can wrap arbitrary files
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Large hex data blocks in OLE object high RTF_EXCESSIVE_HEXRTF contains ~2603KB of hex-encoded data inside \objdata sections — may hide a payload
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Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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OLE object data medium RTF_OBJDATARTF contains 2 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAMRTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL http://schemas.microsoft.com In RTF body
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00002a8a.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x2A8A | 1301505 bytes |
SHA-256: 81867de9e3385812d7617efca92d90621267c3daaf65a0ba1c38ab79781c1286 |
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Detection
ClamAV:
Win.Trojan.LokiBot-7077052-0
Obfuscation or payload:
likely
Carved artifact entropy is 7.43, consistent with packed or encrypted content.
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objdata_01_off00299061.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x299061 | 23598 bytes |
SHA-256: 9d6812245bb9a9acb8a063c32175f2d2d79fdda37feb88384d730b4323f75b05 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS Static shellcode analysis recovered command string(s): cmd.exe /c %tmp%\A.X %
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