Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee306b0b2a9b73b8…

MALICIOUS

PDF

34.7 KB Created: 2018-06-11 10:02:21 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-25
MD5: cefa2bac2ae9c5d8ac0f5ef7af1950ed SHA-1: bca3df1c3d300c6a5a9de81d9b4eff4d5d7aa133 SHA-256: ee306b0b2a9b73b88ef406363e55145374607f890d66f1c59df549e09e2a4f60
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and multiple heuristics indicating it is a fake download lure for SEO poisoning. The document body contains numerous URLs, with a primary focus on a PHP gateway at 'uncpbisdegree.com' which is likely used to distribute malicious payloads. While no scripts were directly extracted, the nature of the PDF and its embedded URLs suggest an attempt to trick users into downloading and executing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9454

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=wedding-card-template-download-full-version.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=wedding-card-template-download-full-version.pdfIn PDF document text
    • https://mountainmodernlife.com/free-wedding-invitation-template/In PDF document text
    • http://www.downloadandprint.com/blog/diy-doily-backer-card-with-free-lace-wedding-invitation/In PDF document text
    • https://lovelyindeed.com/diy-activity-book-free-printable/In PDF document text
    • https://liagriffith.com/diy-paper-rose-wedding-bouquet/In PDF document text
    • http://www.cardsandpockets.com/rustic-free-wedding-invitation-template.aspxIn PDF document text
    • http://www.indesignskills.com/templates/book/In PDF document text
    • http://www.downloadandprint.com/blog/diy-vintage-iron-wedding-invitation/In PDF document text
    • http://www.eatdrinkchic.com/post.cfm/diy-ice-cream-parlour-make-your-own-sundaes-buffet-concept-for-wedding-or-partyIn PDF document text
    • http://www.minieco.co.uk/valentines-day-pixely-popup-card/In PDF document text
    • http://www.a-very-potter-wedding.com/marauders-map-wedding-invitations/In PDF document text
    • https://www.slrlounge.com/photography-contract-template/In PDF document text
    • https://freefincal.com/robo-advisory-software-free-download/In PDF document text
    • http://www.free-css.com/In PDF document text
    • http://uncpbisdegree.com/1/supply-chain-management-a-logistics-perspective-9th-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/yahoo-7-tv-guide.pdfIn PDF document text
    • http://uncpbisdegree.com/1/syncopation-for-the-modern-drummer-ted-reed.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-greatest-storm-britains-night-of-destruction-november-1703.pdfIn PDF document text
    • http://riverside-resort.net/1/what-dogs-hear.pdfIn PDF document text
    • http://riverside-resort.net/1/york-furnace-service-manuals.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-conservatory-gardener.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-cardiovascular-system-anatomy-and-physiology-coloring-workbook-answers.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sennheiser-k6-bedienungsanleitung.pdfIn PDF document text
    • http://uncpbisdegree.com/1/seiko-spc011-watches-owners-manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/Wedding_invitationIn PDF document text
    • https://www.etsy.com/shop/VineWeddingIn PDF document text
    • https://en.wikipedia.org/wiki/Wedding_plannerIn PDF document text
    • http://www.artisteer.com/In PDF document text
    • https://download.cnet.com/Greeting-Card-Designer/3000-6675_4-10250659.htmlIn PDF document text
    • https://download.cnet.com/design-desktop-publishing/windows/In PDF document text
    • https://mobirise.com/bootstrap-template/grid-template.htmlIn PDF document text
    • https://mobirise.com/In PDF document text
    • https://play.google.com/store/apps/details?id=com.canva.editor&hl=en_USIn PDF document text
    • https://themeforest.net/item/flatsome-multipurpose-responsive-woocommerce-theme/5484319In PDF document text
    • https://themeforest.net/item/enfold-responsive-multipurpose-theme/4519990In PDF document text
    • http://www.apnews.com/In 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_off00004b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B63 10532 bytes
SHA-256: 887542c2214196b9ebc7df65bf2dc17a93b120046e1832552ee6dc2645c1ce84
font_01_sfnt_off00006cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB4 7152 bytes
SHA-256: a8bddaf387b9d8f66277ab1233e55f10c063da1fbee6d85e9ba6b24e7d264fdb