RTF / .DOC malware analysis — malicious · 3edf139dc69a2a13

MALICIOUS

RTF / .DOC

226.9 KB

MD5: 913b97b5854cf55af42f4addc47da1ed SHA-1: 743f2ea36e4955153a71653575d81f105e61d4c0 SHA-256: 3edf139dc69a2a13e93483c25c2e0755601a3b0fc50e5a26d832e95f70e2cdca

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The RTF document contains multiple embedded OLE objects, with specific heuristics indicating automatic linking and update triggers. This suggests the document is designed to automatically execute embedded content upon opening, bypassing user interaction for macro enablement. The presence of OLE object data and auto-linking points towards a delivery mechanism for a secondary payload.

Heuristics 6

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 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_off00000965.bin` `680253365a9c675fd477c3b291f1db53b2fe9f2f8250611c49e63efdf5d220f4`	rtf-objdata-decoded	RTF \objdata at offset 0x965	19468 bytes
`objdata_01_off0000a834.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xA834	2632 bytes
`objdata_02_off0000bdd7.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xBDD7	12297 bytes

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