RTF / .DOC malware analysis — malicious · bb53dc1caccf0508

MALICIOUS

RTF / .DOC

283.5 KB First seen: 2022-02-21

MD5: 2b28e4ad561019331c501d8db1e07f0e SHA-1: 4592f220f040c671859c2e830e28814db135eb6b SHA-256: bb53dc1caccf0508324c32d9363662a466ed9b4cb30ae466fb3900fafeb3845e

140 Risk Score

Malware Insights

MITRE ATT&CK

T1204 User Execution: Malicious Link T1566.001 Phishing: Spearphishing Attachment T1059.005 Command and Scripting Interpreter: Visual Basic

The RTF document contains embedded OLE objects, indicated by multiple \objdata sections and \objupdate firings. The presence of 'Please click Enable Editing to view the document.' strongly suggests a lure to bypass macro security settings. The composite moniker related heuristic further points to the exploitation of OLE object activation. While no specific script was extracted, the combination of these factors indicates the document is designed to execute embedded malicious content upon user interaction.

Heuristics 5

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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000ba2.bin` `cf5403fc73a890939f00312f96d9d39aa670830e295bf97aec5f807ce7547072`	rtf-objdata-decoded	RTF \objdata at offset 0xBA2	47725 bytes
`objdata_01_off00019004.bin` `893d8db8585190a273d0c7c3dcff2eb58184b866a3687a9319ca72a8284876cb`	rtf-objdata-decoded	RTF \objdata at offset 0x19004	2632 bytes
`objdata_02_off0001a5a7.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x1A5A7	12297 bytes

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