Malicious RTF — malware analysis report

Static analysis result for SHA-256 9e078800efb0d015…

MALICIOUS

RTF

433.1 KB Created: 2019-09-17 13:59:00 First seen: 2020-05-25
MD5: 5c96977d9b69f30e74327dead9cc6c83 SHA-1: 615b6adfec667530d873be58065a0fd38cd4f457 SHA-256: 9e078800efb0d015e268e68afc688fc189ed29a927fe6df75d174365446569da
222 Risk Score

Malware Insights

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

The RTF file contains multiple indicators of malicious activity, including OLE object embedding and a critical heuristic firing for CVE-2017-8759. This vulnerability is commonly exploited to execute arbitrary code. The presence of embedded OLE objects and the specific CVE strongly suggest the file is a dropper designed to download and execute a second-stage payload.

Heuristics 7

  • 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-7637690-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-7637690-0
  • \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.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Suspicious extracted artifact medium 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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00065182.bin rtf-objdata-decoded RTF \objdata at offset 0x65182 1350 bytes
SHA-256: 1c52dc813347d9a0d5bcdbe65a60b2bb03d3f2d34495b491cabd207bdba1ca31
Detection
ClamAV: No threats found
Obfuscation or payload: likely
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: LoadLibraryW, GetProcAddress, URLDownloadToFileW, ExitProcess

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