RTF malware analysis — malicious · b8e8a4193c949dd8

MALICIOUS

RTF

10.3 KB First seen: 2020-07-24

MD5: 07275cc7a9c2b70e1a9910e907f54302 SHA-1: 769ff32cbfc961da9e959dddfc6dfe6412ba5e7a SHA-256: b8e8a4193c949dd89b02edca84207c21ebfc23cb0d531efec38fa28e022938dc

80 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains an embedded OLE object, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated, likely to exploit a client-side vulnerability. The extracted artifact 'objdata_00_off00001d3d.bin' is a potential shellcode candidate, further supporting the exploitation attempt.

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_off00001d3d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1D3D	1372 bytes
SHA-256: `a95197165dbea08b001a1909e18b1aefc953927802b093beb08b05abba46cb5f`
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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