Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9e8ad4188a3e17…

MALICIOUS

PDF

35.3 KB Created: 2018-06-11 08:32:19 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3fa844c832858b59405c7070025e1c0e SHA-1: dea63b7ba6a172932d6b5f5fefce8ab3322b81aa SHA-256: bd9e8ad4188a3e1796e1fe53eef6bef6657341bc4f4f07d92f4801536822d9cc
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9318

Heuristics 4

  • Fake 'free download' SEO-poisoning PDF critical PDF_SEO_FAKE_DOWNLOAD
    The ML classifier flagged this PDF AND it carries a visual download/call-to-action lure AND an off-domain server-side download-gateway link whose query string names a document payload. This three-signal conjunction is the fake-document / 'free PDF download' SEO-poisoning delivery pattern: the page is padded with benign decoy links to dilute classifier scores while funnelling the victim through the gateway to malware/scareware. Acting only on the conjunction keeps benign download-bearing PDFs from being misflagged.
  • PDF carries a PHP-gateway SEO-spam PDF link farm medium PDF_SEO_PHP_GATEWAY_LINK_FARM
    PDF contains four or more clickable links whose target is a `.php` gateway with a multi-word search-PHRASE document slug embedded after it (e.g. 'index.php?.../binary+options+trading+nz.pdf' or 'pdf.php/cialis-dosage-side-effects.pdf'). Legitimate PHP-served documents use a filename or numeric id, not a search-query phrase, so this is the generated SEO link-farm shape — pharma / binary-options / 'free download' spam that ranks for queries and routes users into payload/redirect chains. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://uncpbisdegree.com/download3.php?q=volvo-truck-ecu-diagrams.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=volvo-truck-ecu-diagrams.pdfIn PDF document text
    • https://www.obd2be.com/volvo-impact-p-612.htmlIn PDF document text
    • http://truck-expert.net/s/In PDF document text
    • https://www.eclipse-tech.co.uk/products/truck/jaltest-truck-package/In PDF document text
    • http://truck-expert.net/s/manual.htmlIn PDF document text
    • http://www.abstroubleshooting.com/index.htmlIn PDF document text
    • http://www.webercarburetors.com/In PDF document text
    • http://www.remmington.info/advice.htmIn PDF document text
    • https://www.epcatalogs.com/Komatsu-Forklift-spare-parts-catalog-parts-manuals-parts-book/In PDF document text
    • https://www.epcatalogs.com/ready_comlexes/komatsu/In PDF document text
    • http://www.autorepairmanuals.biz/page/203572In PDF document text
    • http://dhtauto.com/In PDF document text
    • http://www.autorepairmanuals.biz/product/SK29863In PDF document text
    • http://garageforum.org/Thread-Vivid-WorkshopData-ATI-v10-2-MultilanguageIn PDF document text
    • http://tmpro2.com/software-modules-description-and-prices/In PDF document text
    • http://www.obd2diy.fr/wholesale/diagnostic-camion/In PDF document text
    • https://www.epcatalogs.com/caterpillar-communication-adapter-3/In PDF document text
    • https://www.epcatalogs.com/diagnostic/caterpillar/In PDF document text
    • http://www.my348.com/348/348.htmlIn PDF document text
    • http://www.v-performance.com/products/printable_catalog.htmlIn PDF document text
    • http://www.obd2tool.com/goods-1649-ALL+Auto+repair+software.htmlIn PDF document text
    • http://opengarages.org/handbook/ebook/In PDF document text
    • http://www.fourdoorbronco.com/board/showthread.php?5226-Terms-amp-AbbreviationsIn PDF document text
    • http://www.repairmanual.net.au/ford-falcon-au-series-1-2-3/In PDF document text
    • http://unifeob.edu.br/miniblog/henry-steiner-cabins-masters-thesisIn PDF document text
    • http://riverside-resort.net/1/solution-manual-corporate-finance-ross-westerfield-jaffe-9th-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/swallowed-retainer-wire.pdfIn PDF document text
    • http://riverside-resort.net/1/the-duke-in-my-bed-heirs-club-of-scoundrels-trilogy-1-amelia-grey.pdfIn PDF document text
    • http://riverside-resort.net/1/the-industrial-ventilation-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-dynamics-of-two-party-politics-party-structures-and-the-management-of-competition.pdfIn PDF document text
    • http://riverside-resort.net/1/types-of-reaction-answer-key-chemfiesta.pdfIn PDF document text
    • http://riverside-resort.net/1/standard-chartered-swift-code-pakistan.pdfIn PDF document text
    • http://riverside-resort.net/1/sheep-kidney-dissection-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/the-philippines-land-and-people.pdfIn PDF document text
    • http://riverside-resort.net/1/study-questions-on-the-book-of-revelation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.tacomaworld.com/threads/%E2%80%9Cvolvo-maf%E2%80%9D-conversion-1996-to-1999-3-4-supercharger-upgrade.542496/In PDF document text
    • https://www.tacomaworld.com/forums/1st-gen-tacomas-1995-2004.4/In PDF document text
    • https://www.scribd.com/doc/115024386/Volvo-Error-codesIn PDF document text
    • http://www.alldata.com/tech-tips-trends-blogIn PDF document text
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=http%3a%2f%2fwww.obd2diy.fr%2fwholesale%2fdiagnostic-camion%2fIn PDF document text
    • https://www.aliexpress.com/store/group/Engines/1933846_504338560.htmlIn PDF document text
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409In PDF document text
    • https://go.microsoft.com/fwlink/?linkid=868922In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617297In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2F 10260 bytes
SHA-256: 1508a9a03adbe782cbbd3dde8fbf8d02833f1861e7a6b70d4ed0b503f80d1ed6
font_01_sfnt_off00006eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 7148 bytes
SHA-256: 2fc53e06f181da0b6ab14535a23acc818b3c2c7a14c82c2a111c8aa4a809f82b