RTF / .DOC malware analysis — malicious · 43177446edf0ecf4

MALICIOUS

RTF / .DOC

271.4 KB

MD5: e19877120cf506778507299e311cc1e4 SHA-1: a37dc743c58021d4688c8ec51539f8a064ef0621 SHA-256: 43177446edf0ecf450bdc77b6a2b86c5eded78230c0a56c8b266fee075425dec

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, including an automatically linked object that forces activation. This strongly suggests a lure to execute embedded malicious code, likely a downloader. The 'SE_ENABLE_LURE' heuristic confirms the document attempts to trick the user into enabling macros or editing. No specific family could be identified, and no further IOCs were extracted.

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` `4fed75bb9a6b9dd3aba1ca2e3b333e80c800b6983ed9b330012b942075197345`	rtf-objdata-decoded	RTF \objdata at offset 0x969	41390 bytes
`objdata_01_off00015a54.bin` `9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470`	rtf-objdata-decoded	RTF \objdata at offset 0x15A54	2632 bytes
`objdata_02_off00016ff7.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x16FF7	12297 bytes

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