RTF malware analysis — malicious · 808f3eab9ab519fa

MALICIOUS

RTF

97.3 KB Created: 2022-07-14 13:37:00 First seen: 2022-07-15

MD5: d0e8c8994d4ca0c3c5d81a516b726d9d SHA-1: b8cd13cccc024eb103d249c5331966a7591ade90 SHA-256: 808f3eab9ab519fa8dda92f64e1dc04a086afbf38be31c59a37fecbae0a56e93

242 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter

The RTF file contains embedded OLE objects, specifically triggering the CVE-2017-8570 heuristic which indicates the dropping of an SCT script. This exploit is commonly used to deliver malicious payloads. The presence of composite monikers and automatically linked OLE objects further supports the exploitation of this vulnerability.

Heuristics 8

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.
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.
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
OLE object data medium RTF_OBJDATA

RTF contains 2 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Suspicious extracted artifact medium 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.
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://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000270a.bin` `d43f88f820ff6f5df63eb22aeb36d776483755976f4557755aff1bd0b99eb2a7`	rtf-objdata-decoded	RTF \objdata at offset 0x270A	25924 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off0000f4ba.bin` `79c9830c0d56f4f845f17d9093926aa3dba1a4cc58ec46f44cf65c3daecc1c32`	rtf-objdata-decoded	RTF \objdata at offset 0xF4BA	7872 bytes

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