RTF / .DOC malware analysis — malicious · a7c4e1af232131fc

MALICIOUS

RTF / .DOC

229.2 KB

MD5: 9101cb7d395507cb7e67cbab4e6abb1a SHA-1: 470f8dfb876921d77ff7ac02bdd29c12054b3c77 SHA-256: a7c4e1af232131fcab153968f3affced2544bcdd1e928e9bbefe7b05a3122afb

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF document contains multiple OLE objects, with one being automatically linked and triggered for update. This mechanism is commonly used to execute embedded malicious content, such as macros or exploits, to bypass security measures and deliver a secondary payload. The 'SE_ENABLE_LURE' heuristic further indicates 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_off00000965.bin` `961557cec3c79ea8c067397aeefe8045396dce09df059f7a2656e6277d38ba46`	rtf-objdata-decoded	RTF \objdata at offset 0x965	20571 bytes
`objdata_01_off0000b12a.bin` `1af484323aa51f0bc067b498458ed2106db428c7b743185ac9a6e18e7b648e31`	rtf-objdata-decoded	RTF \objdata at offset 0xB12A	2632 bytes
`objdata_02_off0000c6cd.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xC6CD	12297 bytes

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