MALICIOUS
224
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1027 Obfuscated Files or Information
The RTF file contains multiple OLE objects, with a critical finding indicating exploitation of CVE-2017-8570. This vulnerability allows for the dropping of SCT scripts, which are likely used to execute a malicious payload. The presence of excessive hex data within OLE objects further suggests the hiding of a payload.
Heuristics 8
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Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE_2017_8570RTF \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.
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Composite Moniker in RTF OLE object high RTF_COMPOSITE_MONIKER_RELATEDRTF 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.
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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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Large hex data blocks in OLE object high RTF_EXCESSIVE_HEXRTF contains ~2203KB of hex-encoded data inside \objdata sections — may hide a payload
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OLE object data medium RTF_OBJDATARTF contains 9 \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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Suspicious extracted artifact info 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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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/SMI/2005/WindowsSettings In RTF body
- http://schemas.openxmlformats.org/drawingml/2006/mainIn RTF body
Extracted artifacts 8
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000025.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x25 | 205 bytes |
SHA-256: 980870ba17beb12f03c3941a0cfa655d820816cec9104090156a6ea6ece5ce8a |
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objdata_01_off000001ee.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x1EE | 1101788 bytes |
SHA-256: d38af4dc6fa6a719ad9f86f8c84648d6ebe776f10b062ee70e7b46dcba6b3fa0 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact entropy is 7.83, consistent with packed or encrypted content.
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objdata_02_off0021a72b.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x21A72B | 990 bytes |
SHA-256: 819742f5c84cbe7b646f281a2d66b550ab90b6860c2f5bde5cdca478f30b59a9 |
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objdata_03_off0021af20.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x21AF20 | 26316 bytes |
SHA-256: 89d1c0807f4d4dd2dbc3c5357fc9e55a3129223e5915f30eec025828c74b2682 |
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objdata_04_off00227cf0.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x227CF0 | 380 bytes |
SHA-256: 17e63036be0dbac77e35be89dbbfbf4e8c5055136fd574d2fd6018a721b22af7 |
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objdata_05_off00228024.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x228024 | 882 bytes |
SHA-256: e0dd860bb62dee2108b913a024deb7f63abfad8765c6af0041159382d16d8717 |
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objdata_06_off00228786.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x228786 | 2633 bytes |
SHA-256: fe11c27d916ab897eb94064e9631d8a29c847a6db39259bef31578da8d19fdf5 |
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objdata_07_off00229c9e.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x229C9E | 2601 bytes |
SHA-256: 67ff079a9b0f053ca2843811d9da7a8fdedc7d9d377ef39d09dde148b9657c7f |
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