RTF / .DOC malware analysis — malicious · 1dbdb3669a860127

MALICIOUS

RTF / .DOC

283.3 KB First seen: 2022-02-24

MD5: 6deac17a35151e33f1dc687a2dd913cf SHA-1: 7faadabdc7e46e525df1554f31fe858141de2bbe SHA-256: 1dbdb3669a860127febb17f4e1c8d931119d98569f8c227102d086a812eb5bcb

140 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The RTF document contains multiple embedded OLE objects, with specific heuristics indicating that \objupdate forces OLE activation and the presence of a Composite Moniker. The document body explicitly prompts the user to 'Enable Editing to view the document,' a common lure to bypass macro security settings and execute embedded content. This suggests the file is designed to exploit OLE object activation to deliver a payload.

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` `2abafc00de1fd739ba2dc0a095339668d2c81467cc40c0205f0ce81aeb434149`	rtf-objdata-decoded	RTF \objdata at offset 0xBA2	47640 bytes
`objdata_01_off00018f52.bin` `893d8db8585190a273d0c7c3dcff2eb58184b866a3687a9319ca72a8284876cb`	rtf-objdata-decoded	RTF \objdata at offset 0x18F52	2632 bytes
`objdata_02_off0001a4f5.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x1A4F5	12297 bytes

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