Rtf.Dropper.Agent-6977529-0 — RTF malware analysis

Static analysis result for SHA-256 c69b654570fa97e6…

MALICIOUS

RTF

442.5 KB Created: 2019-01-23 19:55:00 First seen: 2019-09-30
MD5: c55f8dac8f56d9c24b8d1d9094a734bb SHA-1: eaca5a982fa292bc40227895fd4a88f85b89b485 SHA-256: c69b654570fa97e64aed8c835eaf62d9917b31636269cbf4b47557608da2c15a
242 Risk Score

Malware Insights

Rtf.Dropper.Agent-6977529-0 · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object that is forced to activate via \objupdate, exploiting CVE-2017-8759. This indicates the file is a dropper designed to download and execute a secondary payload. ClamAV identified the file as Rtf.Dropper.Agent-6977529-0, supporting its role as a dropper.

Heuristics 6

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • ClamAV: Rtf.Dropper.Agent-6977529-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-6977529-0
  • Suspicious extracted artifact critical 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.
  • \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
  • 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://schemas.microsoft.com/office/word/2003/wordml In RTF body
    • https://bit.ly/2VW0rBeIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0005abf3.bin rtf-objdata-decoded RTF \objdata at offset 0x5ABF3 1262 bytes
SHA-256: 31ab584fe5f21f1f20728ae043f04bf513ec950d2b32d02050b93b348105118c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered URL(s): https://bit.ly/2VW0rBe Static shellcode analysis found candidate code region(s). Indicators: SC_STR_LOADLIBRARY, SC_STR_URLDOWNLOAD, SC_PEB_ACCESS Static shellcode analysis recovered API/import strings: LoadLibraryA, GetProcAddress, URLDownloadToFileA, CreateProcessA, ExitProcess

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