RTF malware analysis — malicious · cdcafe3a0ed53b9c

MALICIOUS

RTF

37.5 KB Authoring application: Riched20 6.3.9600 First seen: 2018-06-14

MD5: 77f2c6013c2125f24104ef277185ce76 SHA-1: b6f2379a54abec5c301cb063107ebce4f9326b54 SHA-256: cdcafe3a0ed53b9cba0385b5ff57e60bf479c34ccfe4dc45972779bd5e25b7aa

362 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains an embedded OLE object that exploits the Equation Editor vulnerability (CVE-2017-11882). This exploit is designed to download and execute a second-stage payload from the URLs http://lokipanelhostingpanel.gq/work/1.vbs and http://lokipanelhostingpanel.gq/work/1.doc. The presence of shellcode commands within extracted artifacts further supports this malicious intent.

Heuristics 10

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: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\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
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.
Embedded URL info EMBEDDED_URL

One 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://lokipanelhostingpanel.gq/work/1.vbs In RTF body
- http://lokipanelhostingpanel.gq/work/1.docIn RTF body

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	10757 bytes
SHA-256: `6d253c2efdadcd05e50bc2256598190296088f59846b998ea6b306332c99f914`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): WScript.Shell"), Powershell -WindowStyle Hidden taskkill /f /im Excel.exe", cmd /c ping -n 3 localhost & ipconfig/rel
`objdata_01_off00005548.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5548	3980 bytes
SHA-256: `d532d04e1249c4bf49c59b5c9827b4c0110c5779e59e25b42490b66435ca5aa1`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): cmd.exe /c%tmp%\1.hta &��D$,f-Q��%
`objdata_02_off0000778e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x778E	3546 bytes
SHA-256: `e5b021ae15959ee0913dc4ff3e3c45c53db91da9b42af4d4b17d41d957c7180a`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): cmd.exe /c%tmp%\1.hta AC

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