Rtf.Dropper.Agent-9965975-1 RTF malware analysis — malicious · 1e2f23f0bcac6ae9

MALICIOUS

RTF

1.43 MB Created: 2020-06-30 18:02:00 First seen: 2020-07-24

MD5: 2ef8dbe494ce10bbf5a1a85f55bb1030 SHA-1: c72178d6343f8806e41d49c61e07fb7e4ae80dfb SHA-256: 1e2f23f0bcac6ae9e9fb7febe74b2a4bb0ccf9a08bee3b95254a6b2e4973eb91

302 Risk Score

Malware Insights

Rtf.Dropper.Agent-9965975-1 · confidence 95%

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1027 Obfuscated Files or Information

The RTF file contains multiple embedded OLE objects, with significant hex-encoded data and a detected PE header within one of these objects. ClamAV identifies this as Rtf.Dropper.Agent-9965975-1, indicating its function as a dropper. The embedded artifacts are likely the payload intended for execution.

Heuristics 9

ClamAV: Rtf.Dropper.Agent-9965975-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Dropper.Agent-9965975-1
PE header (with DOS stub) in hex data critical RTF_MZ_HEX

Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
\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.
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~1440KB of hex-encoded data inside \objdata sections — may hide a payload
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
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00002b4d.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x2B4D	255770 bytes
SHA-256: `69132a058c8d4c66c263b02a689d6af9b4c84cd1cb7abf8ebe689edf554df595`
`objdata_01_off00081c40.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x81C40	457055 bytes
SHA-256: `d85973c828e8f4d198f1b70204fb6d99eb84e8a4e2d1df3c7f4e479b14574a3c`
`objdata_02_off001682d0.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1682D0	1067 bytes
SHA-256: `6c1f866a8fae3f66f6de6069b134273950b7842e3f6a379ead8175b13255617e`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, NOP sled

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