RTF malware analysis — malicious · 1fb1fc161384f774

MALICIOUS

RTF

20.3 KB First seen: 2020-07-02

MD5: 4ec68bcf7298d9eeeee5fb18fbcc317d SHA-1: cccab8440b47831160730e91fe22a6dc4e1ec1c1 SHA-256: 1fb1fc161384f77429327b0e11bebb22607f60a53a6f8f52ec4d3461cab80d7c

80 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this OLE object is designed to be activated automatically, likely to execute embedded shellcode. The extracted artifact 'objdata_00_off00000809.bin' is flagged as a shellcode candidate, further supporting the malicious intent.

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_off00000809.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x809	1899 bytes
SHA-256: `bacc3ec8a8e71bd9bd7d3e228cf4b4f8206ad19a1b68409666c908cdc197be3f`
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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