Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3188332838c540b…

MALICIOUS

PDF

34.0 KB Created: 2018-06-11 09:46:41 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 5d14718e492b3e0960dd16449f436e58 SHA-1: 64e0a2a7c7fa343c20a3e0b4ad63193c0d6e35ee SHA-256: d3188332838c540bd9537d27a7a5a358f5a183a5e5580ba6958b6560fb7c1b61
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=the-golden-ghost.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-golden-ghost.pdfIn PDF document text
    • http://pnwphotoblog.com/golden-oregon-the-driest-ghost-town-in-oregon/In PDF document text
    • https://www.knotts.com/explore/ghost-town-aliveIn PDF document text
    • http://www.duboisdelarayere.com/males/Ghost-GB.htmIn PDF document text
    • http://www.ghostriverbrewing.com/In PDF document text
    • http://www.ghostisland.com/ghost-mapIn PDF document text
    • http://www.herogoggles.com/In PDF document text
    • http://www.elriosf.com/calendar/In PDF document text
    • http://www.americanfolklore.net/spooky-stories.htmlIn PDF document text
    • http://www.antimusic.com/dayinrock/In PDF document text
    • http://www.specialtyproduce.com/produce/June_Plums_4031.phpIn PDF document text
    • http://libertystatepark.com/emma.htmIn PDF document text
    • http://www.alcatraztickets.com/productType/ATTRACTIONIn PDF document text
    • http://www.stormfax.com/2dickens.htmIn PDF document text
    • http://uncpbisdegree.com/1/the-highlanders-conquest-stolen-bride-2-eliza-knight.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solveras-payment-solutions-reviews.pdfIn PDF document text
    • http://uncpbisdegree.com/1/teme-diplome-avokati-ne-nje-proces.pdfIn PDF document text
    • http://uncpbisdegree.com/1/studies-in-aeschylus.pdfIn PDF document text
    • http://uncpbisdegree.com/1/shards-of-time-nightrunner-7-lynn-flewelling.pdfIn PDF document text
    • http://uncpbisdegree.com/1/spiral-theory.pdfIn PDF document text
    • http://uncpbisdegree.com/1/stoichiometry-and-gravimetric-analysis-lab-report-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/what-animals-live-in-the-marine-ecosystem.pdfIn PDF document text
    • http://uncpbisdegree.com/1/spanish-1-eoc-blue-print-test.pdfIn PDF document text
    • http://riverside-resort.net/1/volvo-v50-owners-manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.latimes.com/local/california/la-me-ln-visalia-ransacker-20180507-story.htmlIn PDF document text
    • http://sealonline.wikia.com/wiki/31-45In PDF document text
    • https://en.wikipedia.org/wiki/GhostIn PDF document text
    • http://www.iep.utm.edu/goldrule/In PDF document text
    • https://www.gv.com.sg/GVMovieDetailsIn PDF document text
    • https://www.nasa.gov/centers/ames/missions/archive/pioneer.htmlIn PDF document text
    • http://www.newadvent.org/cathen/g.htmIn PDF document text
    • http://www.newadvent.org/cathen/In PDF document text
    • https://en.wikipedia.org/wiki/List_of_The_Transformers_episodesIn PDF document text
    • http://www.touregypt.net/featurestories/alexandersearch.htmIn PDF document text
    • https://www.imdb.com/name/nm0000469/In PDF document text
    • https://www.youtube.com/watch?v=vuAUI_0knfkIn PDF document text
    • http://mentalfloss.com/article/504950/spookiest-ghost-stories-all-50-statesIn PDF document text
    • http://www.imdb.com/title/tt5516328/In PDF document text
    • https://www.washingtonpost.com/local/public-safety/to-find-alleged-golden-state-killer-investigators-first-found-his-great-great-great-grandparents/2018/04/30/3c865fe7-dfcc-4a0e-b6b2-0bec548d501f_story.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_off00004a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A6E 10332 bytes
SHA-256: 08a986e4b97638d06ef1b2cd742681825699fee8cebfdbe6f3bc05839c518ad4
font_01_sfnt_off00006b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B46 6552 bytes
SHA-256: 966f2cd1ba755d62973e3aba604993d71c61151c09c421b6c6ff1a20f5fca13c