RTF / .DOC malware analysis — malicious · de65a9bf068b1a1e

MALICIOUS

RTF / .DOC

351.2 KB

MD5: 0a540ad3d578e9d57d35fefaeec7afa3 SHA-1: c02966a164da86869571bdee80009ed94d0a3588 SHA-256: de65a9bf068b1a1e39a90fa76354d75caf28d875df8d8550c4f046acd45a21eb

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 an update trigger for activation. This suggests a technique to bypass macro security and execute embedded code. No document body text or scripts were provided, limiting further analysis of the specific payload or lure.

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 4 \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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000bac.bin` `eda5f1f557827c942dfcd9d8df2ec18e9bb918b10fe0cab3244b0358a3fe3715`	rtf-objdata-decoded	RTF \objdata at offset 0xBAC	67631 bytes
`objdata_01_off0000735b.bin` `ccdd1d9515c3b8db0fc401deb44e4f53d4ca100c1fe54f2867b09a13285ec26c`	rtf-objdata-decoded	RTF \objdata at offset 0x735B	67604 bytes
`objdata_02_off00029944.bin` `a8e170497da15decc11753d202c99c86f7a7ffd2d52481e6b9c79a5403675379`	rtf-objdata-decoded	RTF \objdata at offset 0x29944	2632 bytes
`objdata_03_off0002aee7.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x2AEE7	12297 bytes

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