RTF malware analysis — malicious · 9d28b689369d8275

MALICIOUS

RTF

218.0 KB First seen: 2022-04-08

MD5: e3d532268a1df2dea27ba6d85a0f9424 SHA-1: f69780d6cb1d0673c25406b27da4729a2a1933a8 SHA-256: 9d28b689369d8275b6de4377a08d636f72bfe7678d65cb98a06792845f1e736c

123 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model T1204.002 Malicious File

The RTF document contains multiple OLE objects, with heuristics indicating the use of ".objupdate" and composite monikers. This suggests the document is designed to exploit OLE object activation mechanisms to trigger embedded malicious code execution. No document body text or scripts were extracted, limiting further analysis of the specific payload.

Heuristics 4

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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000007d0.bin` `f13273e9d9f96c05282f1dcaf36f521dcad6484a5033b372a3e3ede80b0dd08a`	rtf-objdata-decoded	RTF \objdata at offset 0x7D0	15941 bytes
`objdata_01_off000089f2.bin` `1721aab459b68b884f13b5caf8aed48f2f1a5eb3d65c1b2ddac08c7c93062de4`	rtf-objdata-decoded	RTF \objdata at offset 0x89F2	2632 bytes
`objdata_02_off00009f95.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x9F95	12297 bytes

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