RTF / .DOC malware analysis — malicious · ffb1b14a8f77f897

MALICIOUS

RTF / .DOC

6.1 KB First seen: 2023-02-22

MD5: c7d4749eed4277123b20997cdfcfdfb6 SHA-1: 8f948f5d1780bfce827c0819ffefcf3f86697135 SHA-256: ffb1b14a8f77f8979623d763c3bb0c1c649444ab5947bbaf96b91f2469ee5e32

142 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment T1204 User Execution

The RTF document contains an OLE object that is configured to automatically update, triggering the download of a HTA file from the URL https://a.pomf.cat/zxkqif.hta. This exploit targets CVE-2017-0199, indicating a malicious intent to execute a secondary payload. The HTA file is likely to contain further malicious code.

Heuristics 5

CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL

RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
\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
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 https://a.pomf.cat/zxkqif.hta

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000044.bin` `f98cb4a5d7f1015bc3f353176aab810a85ac6f7578577665a92a13abc30ab46d`	rtf-objdata-decoded	RTF \objdata at offset 0x44	3107 bytes

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