RTF malware analysis — malicious · dbf207dabed259af

MALICIOUS

RTF

7.2 KB First seen: 2019-12-09

MD5: 9b0e3ba68aa1b944e7f0996d26015bf8 SHA-1: 7d7704c2cafc500feb61f2c5ed36f5a5bc00f395 SHA-256: dbf207dabed259af6b4511b8bb2d4105367a97e1563db384cca840dd81a9fdd0

140 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that triggers the Equation Editor vulnerability. This exploit is known to be used for arbitrary code execution, typically to download and run a second-stage payload. The presence of shellcode candidate regions in the extracted artifact further supports this. No specific family could be identified.

Heuristics 4

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
\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_off00000034.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x34	3633 bytes
SHA-256: `2d13330ab1a1d067e3fcca4b1b6bbe081e4927ceab5d565b3299ce3f00b80425`
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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