Malicious PDF — malware analysis report

Static analysis result for SHA-256 267f4e66966996eb…

MALICIOUS

PDF

35.6 KB Created: 2018-06-11 09:58:55 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 6745176ff62272aecb6d1274f2b197c5 SHA-1: ebb96789dd5b305ff9a68a0b5ed0604590c0bbf1 SHA-256: 267f4e66966996eb7c0498a352bdddf3eea32a892520b5ba3188b423440bfc47
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8955

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-240-instrument-wiring.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=volvo-240-instrument-wiring.pdfIn PDF document text
    • http://www.volvotips.com/index.php/240-260/volvo-240-260-service-manual/In PDF document text
    • http://www.volvotips.com/index.php/850-2/volvo-850-s70-v70-c70-service-repair-manual/volvo-850-automatic-transmission-diagnosis-wiring-diagram/In PDF document text
    • http://www.swedishautoparts.com/240/Volvo-240-lights-%26-lenses.htmlIn PDF document text
    • http://www.davebarton.com/coolvolvoproducts.htmlIn PDF document text
    • http://cleanflametrap.com/In PDF document text
    • http://www.volvohowto.com/how-to-service-light-reset-in-volvo-xc60-2013-on/In PDF document text
    • http://www.volvohowto.com/category/p3-platform-volvos/In PDF document text
    • http://www.volvohowto.com/category/p3-platform-volvos/xc60-p3-2009-current/In PDF document text
    • http://www.oldclassiccar.co.uk/modernads_make/volvo.htmIn PDF document text
    • https://www.volvopartswebstore.com/productsearch.aspxIn PDF document text
    • http://www.volvohowto.com/volvo-v70xc70-2000-to-2007-fuses-list-and-amperage/In PDF document text
    • http://www.volvohowto.com/category/p2-platform/In PDF document text
    • http://www.volvohowto.com/category/p2-platform/v70-2000-2007/In PDF document text
    • http://www.michiganmotorz.com/volvo-penta-parts-catalog-c-32_98.htmlIn PDF document text
    • http://www.suwanneesalvage.com/In PDF document text
    • http://boatinfo.no/lib/volvo/manuals/40series.htmlIn PDF document text
    • http://www.norbsauto.com/inventory/retailB.htmIn PDF document text
    • http://riverside-resort.net/1/understanding-earth-excersise-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/september-2018-grade-12-mathematics-paper-2-memo.pdfIn PDF document text
    • http://riverside-resort.net/1/surveying-and-levelling-by-n-basak.pdfIn PDF document text
    • http://riverside-resort.net/1/technical-drawing-basic-activities.pdfIn PDF document text
    • http://riverside-resort.net/1/the-hypothalamic-pituitary-gonadal-axis.pdfIn PDF document text
    • http://riverside-resort.net/1/ti-nspire-cas-ti-nspire-cx-cas-guide-de-seg.pdfIn PDF document text
    • http://riverside-resort.net/1/stuhrling-182-33461-watches-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-future-of-the-public-apos-s-health-in-the-21st-century.pdfIn PDF document text
    • http://riverside-resort.net/1/top-comic-book-artists-ever.pdfIn PDF document text
    • http://riverside-resort.net/1/supersize-me-answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.manualslib.com/manual/576977/Volvo-Early-Design-2000-C70.htmlIn PDF document text
    • https://www.manualslib.com/brand/volvo/automobile.htmlIn PDF document text
    • https://www.manualslib.com/products/Volvo-Early-Design-2000-C70-3056451.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/Volvo_S60In PDF document text
    • https://www.manualslib.com/manual/232370/Volvo-2011-C70.htmlIn PDF document text
    • https://www.manualslib.com/brand/volvo/In PDF document text
    • https://www.manualslib.com/products/Volvo-2011-C70-2236362.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_off00004df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF7 10412 bytes
SHA-256: 763441cd65637fec76e2e2d7f1132a6bf6a399235cf332e9d16179bf1b36d675
font_01_sfnt_off00006f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F18 7336 bytes
SHA-256: 6938a724923941311fe33bb85a044845e73f0595646425151109e8ba96f8c282