RTF malware analysis — malicious · 337451a4d1dfee21

MALICIOUS

RTF

141.3 KB First seen: 2020-06-01

MD5: ba1e8f3b6d26d6703ea79cc3749ef66b SHA-1: e7b550a96e4ea2c029e910cebcaec0f497cbb8ff SHA-256: 337451a4d1dfee21c87132ece88ac4664da6df18ea51d540ba64916493acb0c6

80 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains OLE object data and an \objupdate directive, indicating an attempt to exploit OLE object activation. A suspicious shellcode candidate region was also identified within an embedded OLE object. These factors strongly suggest the file is designed to execute arbitrary code upon opening, likely delivered as a spearphishing attachment.

Heuristics 3

\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 1 \objdata section(s) — embedded OLE objects
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000118c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x118C	41746 bytes
SHA-256: `e0917f352d80d708a00753fea09aede11891d8e4f31d2a938c3bbb922be901f9`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_GETPC_CALL

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