Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28a51a2c1e9a948…

MALICIOUS

PDF

32.1 KB Created: 2018-06-11 08:42:35 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 583f0042bdafaec23abc33ef31a6953e SHA-1: f93cb00eba74432ad4125af957c1cbd09ec52738 SHA-256: d28a51a2c1e9a9485becae691afb4536cef04e4c3415103fe487aa83307ea99a
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9571

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=trane-heat-pump-installation-guide.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=trane-heat-pump-installation-guide.pdfIn PDF document text
    • http://www.heatpumpreview.net/trane-xl16i-heat-pump-review/In PDF document text
    • http://www.heatpumpguide.com/ratings-reviews/trane-heat-pump-reviews-and-ratings/In PDF document text
    • http://www.pickhvac.com/heat-pump/In PDF document text
    • http://www.pickhvac.com/heat-pump/ruud/In PDF document text
    • https://inspectapedia.com/heat/HVAC-Manuals-Air-Conditioners-Boiler-Furnaces-T-Z.phpIn PDF document text
    • http://www.heatpumptalks.com/In PDF document text
    • http://www.heatpumpguide.com/ratings-reviews/goodman-heat-pump-reviews-and-ratings/In PDF document text
    • https://highperformancehvac.com/heat-pump-vs-electric-furnace/In PDF document text
    • http://riverside-resort.net/1/shl-abstract-reasoning-test-answers-2.pdfIn PDF document text
    • http://riverside-resort.net/1/tut-prospectues-2018.pdfIn PDF document text
    • http://riverside-resort.net/1/suzuki-80-atv-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-nascar-way-the-business-that-drives-the-sport-1st-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-mhc-ec50-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-relationship-between-smoking-and-lung-cancer.pdfIn PDF document text
    • http://riverside-resort.net/1/tainted-by-experience-a-life-in-the-arts.pdfIn PDF document text
    • http://riverside-resort.net/1/theoretical-perspectives-on-disaster-management-1st-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/tourism-pat-phase2-grade10.pdfIn PDF document text
    • http://riverside-resort.net/1/the-message-study-bible.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.trane.com/residential/en/resources/glossary/what-is-a-heat-pump.htmlIn PDF document text
    • https://www.trane.com/residential/en/products/heating-and-cooling/heat-pumps/xv20i.htmlIn PDF document text
    • https://www.manualslib.com/manual/642241/Trane-Wsc036e.htmlIn PDF document text
    • https://www.manualslib.com/brand/trane/In PDF document text
    • https://www.manualslib.com/brand/trane/air-conditioner.htmlIn PDF document text
    • https://www.manualslib.com/products/Trane-Wsc036e-3174658.htmlIn PDF document text
    • https://www.angieslist.com/articles/how-much-does-heat-pump-cost.htmIn PDF document text
    • https://www.angieslist.com/articles/In PDF document text
    • https://www.manualslib.com/manual/555483/Trane-Tzone950ac52za.htmlIn PDF document text
    • https://www.manualslib.com/brand/trane/thermostat.htmlIn PDF document text
    • https://www.manualslib.com/products/Trane-Tzone950ac52za-3015343.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_off0000438f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x438F 9956 bytes
SHA-256: d6fa32ea12d6d5d745f02deff34937e3dba7c6a02fd9ecb0a92abfa35c589eb1
font_01_sfnt_off0000635a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635A 7080 bytes
SHA-256: d3da67896d8b8314ccae4ae8525e28becec3680b21165914bcda16a87ee0f832