RTF malware analysis — malicious · af801e43101c06e3

MALICIOUS

RTF

376.9 KB

MD5: c8080fbfc825b01f11973566f1a3e589 SHA-1: 9aa04e64414bef6504b211615f7fcdbe84cd75df SHA-256: af801e43101c06e3366d942715a8b10f90f12ec3437cab1b8a0cc3872101eebe

129 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is an RTF document that contains OLE object data and triggers an Equation Editor vulnerability. This indicates a likely exploit attempt to execute code. The presence of ".bin" in the extracted artifact name suggests a potential secondary payload. The document body is heavily obfuscated and unreadable, providing no direct clues to the user-facing lure.

Heuristics 4

Equation Editor CLSID critical 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 info 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_off00001308.bin` `3e46f623500825a1c30e25cc4e2a0a516d828e8b0c31833b73d59256b90854b3`	rtf-objdata-decoded	RTF \objdata at offset 0x1308	63557 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.94, consistent with packed or encrypted content.

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