Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59bd3dc279851f5…

MALICIOUS

PDF

35.5 KB Created: 2018-06-11 09:09:04 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 74488608188cd7a8b91abf0cd8f2fbbc SHA-1: 07469e9d1e54f2f546e73e9e6ff405b1147f76bb SHA-256: c59bd3dc279851f5d3ff9d635563a119bb1c43135dd3ebcdba73f044c2681c30
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9165

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=vtech-cordless-phone-user-guide.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=vtech-cordless-phone-user-guide.pdfIn PDF document text
    • https://www.vtechphones.com/support/technical-support/product/1584In PDF document text
    • https://businessphones.vtech.com/pd/3638/VCS752-ErisStation-SIP-Conference-Phone-with-Two-Wireless-MicsIn PDF document text
    • https://www.vtechphones.com/store/pd/3350/CM18445-VTech-4-Line-Small-Business-System-Main-ConsoleIn PDF document text
    • https://trustedbeasts.com/best-cordless-phones/In PDF document text
    • http://cordlessworkz.com/dect-6.0-cordless-phone.aspxIn PDF document text
    • https://nerdtechy.com/best-bluetooth-enabled-cordless-phones-reviewsIn PDF document text
    • http://cordlessworkz.com/jitterbug-phone.aspxIn PDF document text
    • https://www.telephonesystemsguide.com/multi-line-phone-systems/In PDF document text
    • http://riverside-resort.net/1/tutorijal-creating-dashboard-for-sharepoint-services.pdfIn PDF document text
    • http://riverside-resort.net/1/seventeenth-summer.pdfIn PDF document text
    • http://riverside-resort.net/1/the-symbolic-quest-basic-concepts-of-analytical-psychology-princeton-paperbacks.pdfIn PDF document text
    • http://riverside-resort.net/1/the-hindu-view-of-life.pdfIn PDF document text
    • http://riverside-resort.net/1/simplicity-sovereign-7016-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/toyota-hilux-electrical-wiring-diagram-interior-light.pdfIn PDF document text
    • http://riverside-resort.net/1/the-marriage-files.pdfIn PDF document text
    • http://riverside-resort.net/1/solutions-and-solubility-worksheet-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/the-pretend-girlfriend-a-billionaire-love-story-1-lucy-lambert.pdfIn PDF document text
    • http://riverside-resort.net/1/the-rise-of-animals-evolution-and-diversification-of-the-kingdom-animalia.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/370178/Vtech-80-5735-00-V-Tech-Vt5823-5-8ghz-Cordless-Phone.htmlIn PDF document text
    • https://www.manualslib.com/brand/In PDF document text
    • https://www.manualslib.com/brand/vtech/In PDF document text
    • https://www.manualslib.com/brand/vtech/cordless-telephone.htmlIn PDF document text
    • https://www.amazon.com/VTech-CS6529-4-Answering-Cordless-Handsets/dp/B00WHYS0R2In PDF document text
    • https://www.amazon.com/Landline-Phones/b?ie=UTF8&node=5728050011In PDF document text
    • https://www.amazon.com/Cordless-Telephones-Office-Electronics/b?ie=UTF8&node=172614In PDF document text
    • https://www.amazon.com/VTech-CS6529-3-Answering-Cordless-Handsets/dp/B00WHYS81AIn PDF document text
    • https://www.consumerreports.org/products/cordless-phone/vtech-ds6671-3-229539/overview/In PDF document text
    • https://www.manualslib.com/manual/188064/Vtech-Vt-1962.htmlIn PDF document text
    • https://www.manualslib.com/products/Vtech-Vt-1962-416876.htmlIn PDF document text
    • https://www.consumerreports.org/products/cordless-phone/ratings-overview/In PDF document text
    • https://www.quill.com/att-cl84207-dect-60-expandable-corded-cordless-phone-answering-system-smart-call-blocker-silver-black-2-handsets/cbs/318783.htmlIn PDF document text
    • https://www.hsn.com/products/atandt-4-handset-cordless-phone-system-with-smart-call-/8595449In PDF document text
    • http://www.toptenreviews.com/electronics/phone/best-cordless-phones/panasonic-kx-tg-review/In PDF document text
    • https://www.walmart.com/ip/Motorola-K704B-DECT-6-0-Cordless-Phone-System-with-Caller-ID-Answering-System-4-Handset-System/37297164In PDF document text
    • https://www.walmart.com/cp/3977In PDF document text
    • https://www.walmart.com/cp/77478In 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_off00004f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F82 10412 bytes
SHA-256: 615285b97be163c6e78a7e8508b7df37a0a8729a1d81a1b56e763dc96f182b31
font_01_sfnt_off0000709a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709A 6768 bytes
SHA-256: e065e2995fd3f67333d2720e973186766b432038060625e1d0e7cb6cc4510081