Office (OLE) / .XLS malware analysis — malicious · 3315b94afcdab31e

MALICIOUS

Office (OLE) / .XLS

326.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 7451f5036ccf641ce356dc4cda1d5549 SHA-1: ca909f76d5320526d8dce56322b96c31f066973e SHA-256: 3315b94afcdab31e97b52e6c5e32583593d601b9a9ef960220b976eef1294cb8

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing for CVE_2017_0199 indicates that the OLE object is attempting to load a remote resource via a URL moniker. The embedded URL, https://instaba.se/Iu8Mgg?&https://codecanyon.net/item/mitalk-p2p-webrtc-realedcloud-video-conference?9033320000, is highly suspicious and likely serves as a loader for a second-stage payload. Additionally, a secondary embedded PDF was found with suspicious static findings, suggesting a multi-stage attack. No VBA macros were extracted, but the primary exploit vector is clear.

Heuristics 4

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.
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
VBA project contains no executable statements low OLE_VBA_MACROS

Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
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://instaba.se/Iu8Mgg?&https://codecCONTENTS��8�Ole

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1206 bytes
`polyglot_child_pdf_off00000e00.pdf` `3f7e14a9a68fa4a25eb758ce59ccbccbd1e267499bd2c934345a80b23f62ee5e`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0xE00	330240 bytes
`polyglot_child_pdf_off0000b600.pdf` `84eddc3bbdb0e854b2bcd7ae75a591810c9291f76af664a45968154bf8214fef`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0xB600	287232 bytes

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