Office (OLE) / .XLS malware analysis — malicious · 61dbabcbad9847c6

MALICIOUS

Office (OLE) / .XLS

777.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-07-27

MD5: 65523ef3f984fcabeebd1218a542b166 SHA-1: f9e1bb54648a948e7ec0f8fc30756a119e35d796 SHA-256: 61dbabcbad9847c675cf70059db13059717e74c4aaa0aae5b52102081333f4d2

134 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE-2017-0199 indicates the sample is designed to exploit this vulnerability to download a remote file. The embedded URL, http://23.94.37.197/IFF/2/HMSDFHJSJDHFJHIIFSIDH%23%23%23%23%23%23%23%23%23%23%23CMDSHFISDHFIISHDIF%23%23%23%23%23%23%23%23%23%23%23%23%23CMDFHISDHFIISDF.doc, is highly suspicious and likely serves as the download source for a secondary payload. The presence of multiple embedded PDF files, some with suspicious static findings, further suggests a multi-stage attack designed to evade detection.

Heuristics 6

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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://23.94.37.197/IFF/2/HMSDFHJSJDHFJHIIFSIDH%23%23%23%23%23%23%23%23%23%23%23CMDSHFISDHFIISHDIF%23%23%23%23%23%23%23%23%23%23%23%23%23CMDFHISDHFIISDF.doc
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 5

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_off00001000.pdf` `eab9724284032c2a33798e75a52006f4078ec5ef757f30e1f56dc98b579ad5ed`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0x1000	791552 bytes
`polyglot_child_pdf_off00006c00.pdf` `cf836683bc67dd377c67d99d536a61800caf9e8b8a8a657961786225e5b01ac4`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0x6C00	768000 bytes
`polyglot_child_pdf_off0000c200.pdf` `345ee2b4ae54c103789775da163478c94ef39b4df3c3e5088ef527b0de3a5558`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0xC200	745984 bytes
`polyglot_child_pdf_off0001c200.pdf` `bd206bf94c5b040c3071f321253f553c140650aea65da1dbcd3c13bc85b91d48`	polyglot-child-pdf	Secondary PDF body inside ole container at offset 0x1C200	680448 bytes

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