Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14f94e2a68bba2e…

MALICIOUS

PDF

49.1 KB Created: 2018-06-11 09:49:05 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 7935e5d9166534f3e30b5f08ddf261c9 SHA-1: 4c5b180ed710599150bbde262b3f513fe21c7951 SHA-256: d14f94e2a68bba2edee8f827221c2094afb705193b8039f259d3c6ec090fe812
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6977

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=tektronix-2212-operator-s-manual.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=tektronix-2212-operator-s-manual.pdfIn PDF document text
    • http://elucom.de/tektronix/2212/tektronix_2212_operator_s_manual.pdfIn PDF document text
    • http://mental-life.de/te/2/tektronix_2212_operator_s_manual.pdfIn PDF document text
    • http://bradleyaffordablefunerals.com/reads-online/tektronix-2212-operator-s-manual.pdfIn PDF document text
    • http://barandis.com/reads-online/tektronix-2212-operator-s-manual.pdfIn PDF document text
    • http://mesyoo.de/tektronix/2212/tektronix_2212_operator_s_manual.pdfIn PDF document text
    • http://finanzfin.de/te/2/tektronix_2212_operator_s_manual.pdfIn PDF document text
    • http://w140.com/tekwiki/wiki/2212In PDF document text
    • http://www.schematicsunlimited.com/t/tektronix/In PDF document text
    • http://riverside-resort.net/1/sudip-das-butler-university.pdfIn PDF document text
    • http://riverside-resort.net/1/special-senses-review.pdfIn PDF document text
    • http://riverside-resort.net/1/the-moulding-of-ukraine-the-constitutional-politics-of-state-formation.pdfIn PDF document text
    • http://riverside-resort.net/1/test-question-about-natural-selection.pdfIn PDF document text
    • http://riverside-resort.net/1/the-presidency-of-thomas-jefferson.pdfIn PDF document text
    • http://riverside-resort.net/1/the-basque-language-in-the-digital-age.pdfIn PDF document text
    • http://riverside-resort.net/1/the-amish-maid-amish-romance-clean-romance-series-amish-maids-book-2.pdfIn PDF document text
    • http://riverside-resort.net/1/the-year-1921-in-review.pdfIn PDF document text
    • http://riverside-resort.net/1/thepatriot-answer-key.pdfIn PDF document text
    • http://riverside-resort.net/1/ten-cities-that-made-an-empire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.tek.com/manual/2712-user-manualIn PDF document text
    • https://www.manualslib.com/manual/1295877/Tektronix-2465a.htmlIn PDF document text
    • https://www.manualslib.com/brand/tektronix/In PDF document text
    • https://www.manualslib.com/brand/tektronix/test-equipment.htmlIn PDF document text
    • https://www.manualslib.com/products/Tektronix-2465a-8765127.htmlIn PDF document text
    • https://archive.org/details/tektronix_2212_smIn PDF document text
    • https://www.ebay.com/sch/sis.html?_nkw=Tektronix+2212+Digital+Storage+OscilloscopeIn PDF document text
    • http://www.ebay.comIn PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617350In 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_off0000740a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740A 14068 bytes
SHA-256: 7b866bd550707cad0edafc5e6d8445f504965942076f6cfcb2c6cc901c136292
font_01_sfnt_off00009f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F68 8604 bytes
SHA-256: 2c3437fc335bb454f69941dbf717115585a91ee07712db2a604011ea75e7ad45