RTF / .DOC malware analysis — malicious · 2765dfd16fdca9a7

MALICIOUS

RTF / .DOC

536.4 KB

MD5: 908cfed6afafd9b15422a10ec069fa9d SHA-1: 039bba1e26fdf4e2c7c9e150451ced968d419ca7 SHA-256: 2765dfd16fdca9a7de04c08d68e28ed8331d98df4e082f10d3cc62ae9a6d09a8

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 OLE objects, with specific heuristics indicating auto-linking and an update trigger (".objupdate"). This suggests the document is designed to automatically activate and execute embedded content when opened, likely to download and run a secondary payload. The SE_ENABLE_LURE heuristic further supports this, indicating the document attempts to trick the user into enabling content execution.

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_off00000bb0.bin` `5801e0052f56b9f075adb89af04a62bbf393824a71637dddda35727b2c46e877`	rtf-objdata-decoded	RTF \objdata at offset 0xBB0	171562 bytes
`objdata_01_off00057e41.bin` `9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470`	rtf-objdata-decoded	RTF \objdata at offset 0x57E41	2632 bytes
`objdata_02_off000593e4.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x593E4	12297 bytes

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