Malicious PDF — malware analysis report

Static analysis result for SHA-256 272f6bced9a4c9b6…

MALICIOUS

PDF

36.4 KB Created: 2018-06-11 09:23:23 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-15
MD5: feb21bedc08605616ee6600a9597074b SHA-1: 7cc9df05bbd63302a81f85342f7c55b49cbe9620 SHA-256: 272f6bced9a4c9b6103ff0050aea7a0e117944c6708bb1ab9594eb1531ec6901
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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-good-sister-drusilla-campbell.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-good-sister-drusilla-campbell.pdfIn PDF document text
    • http://www.nationalreadinggroupmonth.org/ggr_selections.htmlIn PDF document text
    • http://www.globalgraffiti.com/family/sizemore/dickey.htmIn PDF document text
    • http://www.combs-families.org/combs/marriage/dd.htmIn PDF document text
    • http://www.unithistories.com/officers/Army_officers_C01.htmlIn PDF document text
    • http://www.triepels.com/good-transition-words-and-phrases-for-essaysIn PDF document text
    • http://www.wvgenweb.org/marshall/obitr.htmIn PDF document text
    • http://www.slavens.net/pics/index.htmIn PDF document text
    • http://omalmalamutes.com/omal/naming.htmIn PDF document text
    • http://www.cagenweb.com/lake/lakeIn PDF document text
    • http://www.chathamnewsandrecord.com/obituaries-dec-31-2015-dec-4-2014/In PDF document text
    • http://www.ingenweb.org/inparke/obitsB.htmIn PDF document text
    • http://www.chartiers.com/crumrine/twp-wfinley.htmlIn PDF document text
    • http://www.crossfirereviews.com/In PDF document text
    • http://www.aonang.com/resorts.phpIn PDF document text
    • http://www.awkwardmomentsbible.com/shocking-pastors-on-the-prowl/In PDF document text
    • http://www.abitofhistory.net/html/rhw/s.htmIn PDF document text
    • http://www.kykinfolk.com/henry/brickwall.htmIn PDF document text
    • http://uncpbisdegree.com/1/the-balkans-a-short-history-modern-library-chronicles-mark-mazower.pdfIn PDF document text
    • http://riverside-resort.net/1/vicky-angel.pdfIn PDF document text
    • http://riverside-resort.net/1/zazzle-interior-design-business-cards.pdfIn PDF document text
    • http://uncpbisdegree.com/1/tersus-installation-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/vw-t3-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-digestive-concept-mapping-chapter-35.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-impact-of-science-on-society-bertrand-russell.pdfIn PDF document text
    • http://riverside-resort.net/1/vascular-dementia.pdfIn PDF document text
    • http://riverside-resort.net/1/what-the-ceo-wants-you-to-know-the-little-book-of-big-business.pdfIn PDF document text
    • http://riverside-resort.net/1/we-used-to-own-the-bronx-memoirs-of-a-former-debutante.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.gutenberg.org/browse/authors/cIn PDF document text
    • http://tvtropes.org/pmwiki/pmwiki.php/Main/EvenEvilHasLovedOnesIn PDF document text
    • http://tvtropes.org/pmwiki/pmwiki.php/Main/AlwaysSomeoneBetterIn PDF document text
    • https://www.eonline.com/news/In PDF document text
    • https://www.catholic.org/encyclopedia/view.php?id=3894In PDF document text
    • https://www.catholic.org/encyclopedia/In PDF document text
    • https://www.catholic.org/encyclopedia/encyclopedia.phpIn PDF document text
    • https://www.catholic.org/encyclopedia/view.php?id=3788In PDF document text
    • https://en.wikipedia.org/wiki/Mary_MagdaleneIn PDF document text
    • http://www.mit.edu/~dfm/genealogy/sercombe.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/List_of_The_Garfield_Show_episodesIn PDF document text
    • https://www.onelook.com/pm/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_off0000519d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x519D 10232 bytes
SHA-256: 4ffb9ad366aa1ad552d5d429247de94a4dbe9ab8df9042b19df301830426f532
font_01_sfnt_off00007242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 7320 bytes
SHA-256: c5732f7bc643724c4f8f95e105a4875efd4364941bcf40f74555dd68ede8d81d