Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea96988d01acf63…

MALICIOUS

PDF

29.1 KB Created: 2018-06-11 09:26:41 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5369c994f2ee4cda6a2df1a1aeda6de1 SHA-1: e7aad9528d4c1c6e876aaef9233ee50b370e09d9 SHA-256: 2ea96988d01acf63d3af5bb625c3b71ffc1ebcf75eed9bacc1e9865c2acaf610
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9686

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=shoei-paper-folding-machine-manual.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=shoei-paper-folding-machine-manual.pdfIn PDF document text
    • http://www.printcities.com/equipment_dealers_around_t.htmIn PDF document text
    • http://www.machineryeurope.com/brand/heidelbergIn PDF document text
    • https://procycle.us/bikepages/drz400.htmlIn PDF document text
    • https://procycle.us/bikepages/klr650.htmlIn PDF document text
    • http://fukuokajapan.loan/Zamboanga-Philippines/Zamboanga-Philippines-ky.phpIn PDF document text
    • http://www.prc68.com/I/FlashlightPat.shtmlIn PDF document text
    • http://uncpbisdegree.com/1/shadow-watch-tom-clancys-power-plays.pdfIn PDF document text
    • http://riverside-resort.net/1/verbs-in-swedish.pdfIn PDF document text
    • http://uncpbisdegree.com/1/suzuki-rm-370-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/warn-winch-x8000i-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sony-tv-questions-and-answers.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-everlasting-now.pdfIn PDF document text
    • http://riverside-resort.net/1/user-guide-550d.pdfIn PDF document text
    • http://uncpbisdegree.com/1/summertime-vanessa-lafaye.pdfIn PDF document text
    • http://riverside-resort.net/1/www-manual-mazda6-com.pdfIn PDF document text
    • http://uncpbisdegree.com/1/six-impossible-things-fiona-wood.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.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_off00003628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3628 10848 bytes
SHA-256: 90aa9645cbbe85a61fc854d90a77121c153ea5d0d53ade69f656aae0b348f58f
font_01_sfnt_off00005882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5882 7080 bytes
SHA-256: baa32eca5e56b850f4af704b301488a9d576706879d403a21e1491ae4589fbbb