MALICIOUS
122
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
T1027 Obfuscated Files or Information
The RTF document contains a large OLE object with excessive hex-encoded data, strongly suggesting it is designed to exploit a vulnerability upon activation. The presence of `RTF_OBJUPDATE` indicates an attempt to force OLE activation, likely to trigger an embedded exploit. The extracted artifact `objdata_00_off0000008a.bin` is suspicious due to its size and high entropy, further supporting the hypothesis of a hidden payload.
Heuristics 5
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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Large hex data blocks in OLE object high RTF_EXCESSIVE_HEXRTF contains ~1194KB of hex-encoded data inside \objdata sections — may hide a payload
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OLE object data medium RTF_OBJDATARTF contains 1 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000008a.bin5f130d1daddd31545237aa36808373554a53ae5a7103a2b781d48531b671aee6 |
rtf-objdata-decoded | RTF \objdata at offset 0x8A | 597042 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
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