RTF malware analysis — malicious · c2cc944961394bb4

MALICIOUS

RTF

261.0 KB

MD5: cc85b62d7417aa210b0dfaaddc8dccf8 SHA-1: 115123c06c33b6de089f7998e56dddd9264a7c4e SHA-256: c2cc944961394bb499d7401df2ed5121ebe2daec1caebbc0e61513f28d153ce9

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF file contains multiple OLE objects, including one that triggers an objupdate directive, indicating an attempt to activate embedded content. The document body explicitly prompts the user to 'Enable Editing', a common lure for macro-based malware. While no scripts were directly extracted, the presence of OLE objects and the lure strongly suggest the file is designed to execute embedded malicious code, likely a downloader or dropper.

Heuristics 7

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.
\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
OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM

RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
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
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000b44.bin` `d859589b6eb6bdba86235326df6cbc0ad9dfbd912fd5760f45c3a75900329639`	rtf-objdata-decoded	RTF \objdata at offset 0xB44	37548 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).
`objdata_01_off000131a1.bin` `12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece`	rtf-objdata-decoded	RTF \objdata at offset 0x131A1	12261 bytes
`objdata_02_off000191b3.bin` `a483f12dcb6e4b0551213d4a635fd37957956b42b40e2fc9f057edbc2419eb50`	rtf-objdata-decoded	RTF \objdata at offset 0x191B3	2632 bytes

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