Malicious RTF — malware analysis report

Static analysis result for SHA-256 e0bc6cc8d075d9de…

MALICIOUS

RTF

233.6 KB First seen: 2019-12-10
MD5: a2c666fa5a13c744ad2c859e8874eb1b SHA-1: c19d97f366747bf02e43b9ccef17daa8be90fb4c SHA-256: e0bc6cc8d075d9de8e9bc531b410f820ca0eb5995e79cf49b6a3897663c20622
322 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains OLE objects and triggers the CVE-2017-8570 vulnerability, which is known to drop SCT scripts. The embedded URL 'httP://neeladri.com/documents.exe' suggests the file is intended to download and execute a malicious executable. The heuristic firings strongly indicate exploitation for client execution, likely leading to the download of a secondary payload.

Heuristics 10

  • Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570
    RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • ClamAV: Rtf.Dropper.Agent-7119134-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7119134-0
  • \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.
  • Suspicious extracted artifact high 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.
  • OLE object data medium RTF_OBJDATA
    RTF contains 3 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL httP://neeladri.com/documents.exe In RTF body

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000547d.bin rtf-objdata-decoded RTF \objdata at offset 0x547D 14110 bytes
SHA-256: edc18de49963863bda567490e6f197695097df970639a5ef71120af87c4447b1
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): WScript.Sh"
objdata_01_off0000c3be.bin rtf-objdata-decoded RTF \objdata at offset 0xC3BE 12261 bytes
SHA-256: 04aa08ecdc0efa41170a070ca25860aacab1aa073c2b56e46d63ff336a7e2e8b
objdata_02_off000123d0.bin rtf-objdata-decoded RTF \objdata at offset 0x123D0 2632 bytes
SHA-256: 532e20e0d05c9aa834799951e1c9fd4596ebf96d4777287385482846c9c9fcad

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