Win.Dropper.HawkEye-9215870-0 RTF malware analysis — malicious · 8e8e9810f5fca11a

MALICIOUS

RTF

1.72 MB Authoring application: Riched20 6.3.9600 First seen: 2019-05-31

MD5: 6f4ba5bff2b371bc4755203f3b737096 SHA-1: 070201c98f92e7d663cac9bf022986821b80f525 SHA-256: 8e8e9810f5fca11afe834f0e07b9841dd613899f396f2f9ffba54ec455dcce72

520 Risk Score

Malware Insights

Win.Dropper.HawkEye-9215870-0 · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that exploits the Equation Editor vulnerability (CVE-2017-11882). This exploit is designed to execute arbitrary code, likely delivering a second-stage payload. ClamAV identifies the sample as Win.Dropper.HawkEye-9215870-0, indicating its function as a dropper.

Heuristics 11

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882

Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
ClamAV: Win.Dropper.HawkEye-9215870-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Dropper.HawkEye-9215870-0
PE header (with DOS stub) in hex data critical RTF_MZ_HEX

Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
\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.
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~1786KB of hex-encoded data inside \objdata sections — may hide a payload
Suspicious extracted artifact high 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.
OLE object data medium RTF_OBJDATA

RTF contains 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM

RTF 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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000000ef.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xEF	893159 bytes
SHA-256: `0774cd6b4524231920c198b9213cf3421735d755a66b2fe75e80f4961e8ccb75`
Detection ClamAV: Win.Dropper.HawkEye-9215870-0 Obfuscation or payload: likely Carved artifact entropy is 7.44, consistent with packed or encrypted content.
`objdata_01_off001b430c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1B430C	3980 bytes
SHA-256: `f182b189c0acd7427a46654c83581ec0ef2e1bb7534b9aae3c1c7a56f0663c79`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): cmd.exe /c%tmp%\system.exe &��D$,f-Q��%
`objdata_02_off001b6552.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1B6552	3546 bytes
SHA-256: `0a43e156e23ae4e11e41b41259620c3e85fc15d570e91716a4b3b387a4ba55b0`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): cmd.exe /c%tmp%\system.exe AC

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