RTF / .DOC malware analysis — malicious · 1afd6aa8f496182f

MALICIOUS

RTF / .DOC

310.4 KB

MD5: bacb245393cd2f47bcf72d8e35405e3c SHA-1: 583f6d9fc9dca3706342132804ac20d713a228a2 SHA-256: 1afd6aa8f496182fa2c4dbc3018c26498c3c74950bb4180780cfd172021c1ff1

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The sample is an RTF document containing an embedded OLE object, specifically targeting the Equation Editor vulnerability. The `RTF_EQUATION_EDITOR` and `RTF_OBJUPDATE` heuristics indicate that this object is designed to be activated and likely executes code. The presence of `RTF_OBJDATA` further confirms the embedding of executable content. While no specific download URL or script was directly extracted, the exploit mechanism strongly suggests the document's purpose is to download and execute a secondary payload.

Heuristics 4

Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\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_off0000108a.bin` `11e0cee74fe1568a99b0d740d684f79a75064e200e3f7738a4b86e9c83e57e73`	rtf-objdata-decoded	RTF \objdata at offset 0x108A	156533 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.