RTF / .DOC malware analysis — malicious · 72342930696771d8

MALICIOUS

RTF / .DOC

255.7 KB First seen: 2023-01-25

MD5: 72af4b046582fa39d8a302d460de50c9 SHA-1: 79fb9c95dd88ed5e4343f0f8e2603b4a296150b7 SHA-256: 72342930696771d8f979442184cf8503588840bc32843f172d185ef334285664

220 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: User Execution: Malicious File T1566.001 Phishing: Spearphishing Attachment

The sample is an RTF document that leverages OLE object data and a composite moniker to exploit CVE-2017-8570, which is known to drop SCT scripts. The document body explicitly instructs the user to 'click Enable Editing when opening', indicating a social engineering lure to bypass security measures. The extracted artifacts, objdata_00_off0000095f.bin, objdata_01_off00012091.bin, and objdata_02_off00013634.bin, are likely components of this exploit chain.

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.
\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 3 \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
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000095f.bin` `e0f5d1870d1ca6b852ae37bf691fac83c38ff255fae77c73d65eba6687dcd9ae`	rtf-objdata-decoded	RTF \objdata at offset 0x95F	34287 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off00012091.bin` `24fedef2d4fe5e3d6666fae2543850c54134511ad6be8583d5aa0438ef699c5d`	rtf-objdata-decoded	RTF \objdata at offset 0x12091	2632 bytes
`objdata_02_off00013634.bin` `142dc43284d9abe994719f8fb67bc4c04bfc3f07528a1a66b0bad7e552ee8e78`	rtf-objdata-decoded	RTF \objdata at offset 0x13634	12297 bytes

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