RTF malware analysis — malicious · c7b0a6c41a6c9b96

MALICIOUS

RTF

375.9 KB

MD5: 7548b08c332198dcd103def8f446d305 SHA-1: 11728cb7a71a87844a56314b80c7571057e11188 SHA-256: c7b0a6c41a6c9b96f692f6773ff76d8f7d312419559c3c540b0b1bfb368d37f3

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 manipulation, specifically related to CVE-2017-8570 and the use of composite monikers. The document body includes a lure instructing the user to 'Enable Editing', a common tactic to bypass macro security. The presence of OLE object data and automatic linking suggests an attempt to embed and execute a secondary payload, likely a script.

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_off00000bac.bin` `93f6568cbe6e7a935bd283a400007b01b8a0b01fa4dff545d9012e92143e70d6`	rtf-objdata-decoded	RTF \objdata at offset 0xBAC	79780 bytes
`objdata_01_off0000735b.bin` `f74e75245a0a35976a9597a54526083ac10e1c0fd64e25020590228ef0ffbef0`	rtf-objdata-decoded	RTF \objdata at offset 0x735B	79753 bytes
`objdata_02_off0002fbfa.bin` `a8e170497da15decc11753d202c99c86f7a7ffd2d52481e6b9c79a5403675379`	rtf-objdata-decoded	RTF \objdata at offset 0x2FBFA	2632 bytes
`objdata_03_off0003119d.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x3119D	12297 bytes

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