RTF / .DOC malware analysis — malicious · cfc82cb1e236a5a7

MALICIOUS

RTF / .DOC

241.5 KB

MD5: 9f808fffcc7a5d5ab32bb8434dd8a21f SHA-1: b6b233c722e662e40528e2a5f0e767df170a19b0 SHA-256: cfc82cb1e236a5a7d72c34f974bd0292c9b1ef6181f7f1a4e591aa3b17024158

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 exploit OLE object activation to execute arbitrary code. The 'SE_ENABLE_LURE' heuristic further confirms that the document likely contains instructions to the user to enable content, a common social engineering tactic for malware delivery. The exact payload or execution method is not detailed by the heuristics, hence the family is unknown.

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_off00000969.bin` `348e46bfb9f8bf3efcf865a01b05f9edfdce63110a83885db93faecfff6edc92`	rtf-objdata-decoded	RTF \objdata at offset 0x969	26654 bytes
`objdata_01_off0000e29a.bin` `9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470`	rtf-objdata-decoded	RTF \objdata at offset 0xE29A	2632 bytes
`objdata_02_off0000f83d.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xF83D	12297 bytes

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