RTF malware analysis — malicious · 4f2882309009fd91

MALICIOUS

RTF

487.7 KB First seen: 2022-06-05

MD5: eafcffaffefde51941a66d166e2168b7 SHA-1: 84694bedecef6d7523db413c86e3eed2b8f6c061 SHA-256: 4f2882309009fd919225eb2d0be92bdc38d2bea1e2e861c3655ca87c87ffa042

160 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking T1137.001 DLL Search Order Hijacking

The RTF document contains multiple OLE objects, with high-confidence heuristics indicating automatic linking and update mechanisms that force OLE activation. This suggests the document is designed to exploit vulnerabilities within OLE object handling to execute arbitrary code. The document body contains heavily obfuscated or placeholder text, providing no clear user-facing lure.

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.
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

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000007f8.bin` `ac501e0ad89d72652c6882d56e4875e75e21f79d81448d1fe57646b3f6424862`	rtf-objdata-decoded	RTF \objdata at offset 0x7F8	141059 bytes
`objdata_01_off00004106.bin` `f822b384aeefd57ddbba4e99cc8bb8363087e1dbfc33d7dd6de675d88b9f92a4`	rtf-objdata-decoded	RTF \objdata at offset 0x4106	141033 bytes
`objdata_02_off0004bb8b.bin` `3cd3b7d42e5855c90d6d11c54ef2670ed8970441480cc23f7d39ef08fa1c935b`	rtf-objdata-decoded	RTF \objdata at offset 0x4BB8B	2632 bytes
`objdata_03_off0004d12e.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x4D12E	12297 bytes

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