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

Static analysis result for SHA-256 32d74083a7051fec…

MALICIOUS

Office (OLE) / .XLS

1.13 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-24
MD5: 35d9ea79ef3fad55b931bc695ff8ffad SHA-1: ceaeeadf8ae67ec718333ee3eaa60a6fe0e2a880 SHA-256: 32d74083a7051fec2f112ef436e667dd1a6fbfcc499edd8f19e7fca9b8ac73ec
172 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1559.002 Component Object Model Hijacking

The critical heuristic firing for CVE_2017_11882_EQUATION_OLE10NATIVE indicates exploitation of a known vulnerability in Microsoft Equation Editor. This is further supported by the OLE_EQUATION_EDITOR heuristic. The sample also contains embedded PDF files with suspicious static findings, suggesting a multi-stage attack. The VBA macros are benign and do not contain executable statements.

Heuristics 6

  • Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE
    An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
  • 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.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
ole10native_00.bin
4e115b20052dae84194523cd9f7237f36d402a62cd0fc68ba80ee4e46c345bf6		 ole-package OLE Ole10Native stream: MBD00125C54/oLE10natiVE 1313 bytes
polyglot_child_pdf_off00049e00.pdf
54816ead8ed7930c3dfe6157773061f9922b9bc52d5c3e7d6ab36928c7002c59		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x49E00 883712 bytes
polyglot_child_pdf_off00001000.pdf
99e18222604f7bf14f2da0839e9efdfd59a329a8384a58a488195f4aaaab3430		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x1000 1182208 bytes
polyglot_child_pdf_off00006200.pdf
85f7e71c26f115d7c198910f8b3eee27258065b4749a64c70a4b2f65bbff3695		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x6200 1161216 bytes
polyglot_child_pdf_off00009600.pdf
36a3b84c6111214671bd726714b69e8840e1e5d3978bbd12407c3c3f8c7efae4		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x9600 1147904 bytes

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