RTF malware analysis — malicious · 3392ab9b823d2bdb

MALICIOUS

RTF

212.2 KB First seen: 2019-08-04

MD5: 568207b5f16db3f248f5c74fd7ae6ed7 SHA-1: 678f2a5830cfffeecf0b814fc3a4329850f2e5ef SHA-256: 3392ab9b823d2bdb7b4eb9e14ed24a26ee4836698cc8160fdf4049cf5bb7d705

262 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains multiple indicators of malicious activity, including the exploitation of CVE-2017-8570 via a composite moniker. This vulnerability is known to drop and execute SCT scripts, which in turn likely download and execute a second-stage payload from the embedded URL. The presence of OLE object data and the ".objdata" sections further support this attack vector.

Heuristics 9

Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570

RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
\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.
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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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 httPs://iwantthisandthat2.com/cry.exe In RTF body

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00005500.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5500	3034 bytes
SHA-256: `3ee262fe71feaee97f278766bb65569deb23a698d89a52db94b68ae2d874e8a3`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): WScript.Sh"
`objdata_01_off00006db9.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6DB9	12261 bytes
SHA-256: `c2e145786c38ff9a9613cb6195c0ab2d111b825bcc544af402b58d34f065621c`
`objdata_02_off0000cdcb.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xCDCB	2632 bytes
SHA-256: `f1b93a29853eab7400410bb34867b20d32b470381db51ad9259da90590335fa8`

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