RTF malware analysis — malicious · ed8a4932c1bc0eed

MALICIOUS

RTF

63.1 KB First seen: 2019-11-20

MD5: bb7e1cbd3a6bb5131a7d8b544e68e5b2 SHA-1: 3c12f9d94044d36d453007ddbcb85c07a18e0dee SHA-256: ed8a4932c1bc0eed0421aa3d192d1ae7e937082b9828cdded84086873292234e

122 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains OLE object data and an \objupdate directive, indicating an attempt to exploit a vulnerability for client execution. A suspicious artifact was extracted, suggesting shellcode and a URL for a second-stage payload. The embedded URL, while currently benign, is noted as a potential indicator.

Heuristics 4

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
- http://bit.ly/2Lx2FyHIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000e771.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xE771	1667 bytes
SHA-256: `765ecc46d60d8cf8997bb87fdad7f7c1f5d0ae49817e7f750c69a9df9fdd007c`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered URL(s): http://bit.ly/2Lx2FyH 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, ExitProcess

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