RTF / .DOC malware analysis — malicious · 438df5a980d0c5d2

MALICIOUS

RTF / .DOC

1.85 MB

MD5: f30d17390cd27063579259031b15aff2 SHA-1: 0ad2253fcc50922c81af9872eac8bd8fd73ddd1b SHA-256: 438df5a980d0c5d2da217708f647eca7b16e6d9d9f474aca3d0c6d562bcaf06f

202 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File Execution: Malicious Code

The RTF document contains an embedded OLE object that leverages the Equation Editor vulnerability (CVE-2017-11882). Static analysis indicates this object contains decoded payload data, likely a PE file, which is then executed. The presence of RTF_EQUATION_EDITOR and RTF_OBJAUTLINK heuristics strongly suggests this exploit is used to download and run a secondary malicious payload.

Heuristics 6

Decoded Equation Editor payload + PE critical RTF_EQUATION_EDITOR

RTF decodes to an Equation Editor ProgID adjacent to OLE activation and the same decoded object stream contains embedded PE bytes. This matches the Equation Editor exploit surface used by CVE-2017-11882 / CVE-2018-0802 documents, while requiring payload evidence to avoid flagging benign Equation references.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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.
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~1933KB of hex-encoded data inside \objdata sections — may hide a payload
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_off000011ea.bin` `61442879291885927efcec856c370e7a055403c10a27cf148bcab720cd1f6a14`	rtf-objdata-decoded	RTF \objdata at offset 0x11EA	967000 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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