RTF malware analysis — malicious · ff5b1757e99386d6

MALICIOUS

RTF

662.3 KB

MD5: a1e6e23fdab0b4c04f4ca03b3aefbbb2 SHA-1: bee6894225af98f8556bf845c1f15e25ecac48eb SHA-256: ff5b1757e99386d6dc83a49b7bc4e1107a5695d2bb4791a0b2024fa26c97da75

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains multiple indicators of malicious OLE object embedding, specifically related to CVE-2017-8570, which is known to drop SCT scripts. The document body explicitly instructs the user to 'click Enable Editing', a common lure to bypass macro security. The presence of OLE object data and composite monikers strongly suggests the file is designed to exploit this vulnerability to execute a secondary payload.

Heuristics 7

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.
\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.
OLE object data medium RTF_OBJDATA

RTF contains 4 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
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

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000965.bin` `275afe4ecce8b3091d932a449b805b5e1132453286d90cd6c1120a50bd63f9f7`	rtf-objdata-decoded	RTF \objdata at offset 0x965	221077 bytes
`objdata_01_off00007114.bin` `35dbe648c7ece688b01567505e8a3210e39d90a0f494a9948a51509b9b6ce39d`	rtf-objdata-decoded	RTF \objdata at offset 0x7114	221050 bytes
`objdata_02_off000775bd.bin` `51ef705eef602ac6eb91c2063c8f50d4e54b5e051b60429031d41133bc7df645`	rtf-objdata-decoded	RTF \objdata at offset 0x775BD	2632 bytes
`objdata_03_off00078b60.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x78B60	12297 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.