Malicious PDF — malware analysis report

Static analysis result for SHA-256 c004dd9c9dab2759…

MALICIOUS

PDF

35.9 KB Created: 2018-06-11 09:36:38 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 0b34a31f8ed167d4446c85b7bdf29c54 SHA-1: a13e93796069fce3980f435ba96aa15576163b59 SHA-256: c004dd9c9dab275970abdf795d89d20b49e4c7de8a781e07f0f707df0e3e787b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded URLs that point to a suspicious domain, suggesting a potential phishing or malware distribution attempt. The ML classifier flagged this PDF as malicious with a high score. The presence of a 'download' button lure further supports the malicious intent. The document body contains multiple instances of the suspicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7670

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-violet-bakery-cookbook.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-violet-bakery-cookbook.pdfIn PDF document text
    • http://www.violetcakes.com/books/In PDF document text
    • http://www.violetcakes.com/In PDF document text
    • http://wayfaringchocolate.com/2011/07/25/chocolate-date-meringue-torte-cookbook-challenge-dessert/In PDF document text
    • http://www.confessionsofacookbookqueen.com/fudgy-cookies-and-cream-cake/In PDF document text
    • https://www.gretchensbakery.com/yellow-sponge-cake-recipe/In PDF document text
    • https://grandbaby-cakes.com/red-velvet-cake-with-blackberry-cream-cheese-frosting/In PDF document text
    • http://www.landgirl1980.co.uk/2012/05/ww2-eggless-sponge.htmlIn PDF document text
    • http://wayfaringchocolate.com/2011/02/14/whittakers-62-dark-cacao-chocolate/In PDF document text
    • https://www.roalddahl.com/home/teachersIn PDF document text
    • http://www.roalddahl.com/In PDF document text
    • http://www.omnivorebooks.com/antiquarian_archive01.htmlIn PDF document text
    • http://www.foodtimeline.org/foodfaq2.htmlIn PDF document text
    • http://www.foodhoe.com/In PDF document text
    • http://www.bookfreek.com/In PDF document text
    • https://beekman1802.com/beekman-1802-almanac/In PDF document text
    • http://ohsheglows.com/2017/02/13/hunky-heartbeet-cabbage-soup/In PDF document text
    • http://riverside-resort.net/1/tv-guide-home-delivery.pdfIn PDF document text
    • http://riverside-resort.net/1/the-twilight-hour-nicci-gerrard.pdfIn PDF document text
    • http://riverside-resort.net/1/the-facts-on-file-encyclopedia-of-world-mythology-and-legend.pdfIn PDF document text
    • http://riverside-resort.net/1/the-language-of-success.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-str-dh100-receiver-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/student-activities-manual-for-treffpunkt-deutsch-grundstufe.pdfIn PDF document text
    • http://riverside-resort.net/1/sinus-stones.pdfIn PDF document text
    • http://riverside-resort.net/1/the-sumerians-their-history-culture-and-character-phoenix-books.pdfIn PDF document text
    • http://riverside-resort.net/1/the-stone-carvers.pdfIn PDF document text
    • http://riverside-resort.net/1/tema-diplome-te-gateshme-ne-menaxhim-biznesi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.chatelaine.com/food/cookbooks/meghan-markle-violet-bakery-cookbook-review/In PDF document text
    • https://www.instagram.com/violetcakeslondon/In PDF document text
    • http://www.chatelaine.com/recipe/desserts/violet-bakery-lemon-drizzle-loaf/In PDF document text
    • https://en.wikipedia.org/wiki/James_Beard_Foundation_AwardIn PDF document text
    • http://www.dailymail.co.uk/femail/food/article-5007971/Bake-s-Flora-Shedden-opens-artisan-bakery.htmlIn PDF document text
    • https://www.forbes.com/sites/michelinemaynard/2018/03/20/an-american-baker-in-london-gets-the-nod-to-make-harry-and-meghans-wedding-cake/In PDF document text
    • https://www.washingtonpost.com/news/voraciously/wp/2018/04/25/a-quest-to-find-the-recipe-for-the-royal-wedding-cake/In PDF document text
    • https://www.forbes.com/sites/jordilippemcgraw/2018/04/30/royal-wedding-hotel-packages/In PDF document text
    • http://nasilemaklover.blogspot.com/In PDF document text
    • https://food52.com/blog/21391-a-professional-baker-s-insider-tips-for-making-the-best-macaronsIn PDF document text
    • https://www.williams-sonoma.com/products/mixed-succulent-wreath/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_off00005290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5290 9736 bytes
SHA-256: efdbc44012e6119ac9ad4d719c5f06a24b6167285da862d128787db0fd6ee1fb
font_01_sfnt_off000071c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 6692 bytes
SHA-256: 582d1fcd178b31779c8fbb72c754211b916123383c2945594193b6af91e7b91b