Malicious Office (OLE) / .XLSX — malware analysis report

Static analysis result for SHA-256 dfc4a94120f64c9a…

MALICIOUS

Office (OLE) / .XLSX

1.30 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 7b3b414c75a7a8c56f4c577f41cbb64e SHA-1: 32f5443ac1ccc31d00218b540b729781690f3ea9 SHA-256: dfc4a94120f64c9a388c2a977b82eca0828e8af9f5577ccfbbfe9b112835cc83
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The critical heuristic firing indicates the exploitation of CVE-2017-0199, which is a known vulnerability used to download and execute remote content. The embedded URL 'https://cebol.me/zsXf68?&' is likely the source of the secondary payload. The presence of embedded PDF streams and font data suggests a complex document structure designed to facilitate the exploit.

Heuristics 2

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • 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://cebol.me/zsXf68?&

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off0001452b.bin
b0a7e7055d5b66edffe76c7b1f32ec80318d696df6181f1536f27aa69517872f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1452B 566620 bytes
stream_002_off000441fe.bin
0d5715bfb4def94d644e408c5ed714ea2ac557b061d036e7fdcf0a2bf1c990e2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x441FE 398152 bytes
font_02_sfnt_off0005d2ce.bin
ff37b045be3591e8cfbfa76f5dec51bee78deccafa1dc391d1edb36502c7f815
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2CE 346068 bytes