Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9d9bbb01e7b11e…

MALICIOUS

PDF

35.8 KB Created: 2018-06-11 09:55:05 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 008c5ffc1859933006db85c65ec8fe49 SHA-1: 124001745001eef18db83aa2aba375eb0a0aaa3b SHA-256: ec9d9bbb01e7b11ec6b35feaa8d884fa4d2cb2f9ceb51d4c3fa7a1d65274a5fa
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 phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. The presence of a 'download' button lure, combined with the external URI pointing to a download script, indicates the document's primary purpose is to trick the user into downloading a potentially harmful file. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9434

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=world-cultures-a-global-mosaic-answers.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=world-cultures-a-global-mosaic-answers.pdfIn PDF document text
    • https://www.linktv.org/In PDF document text
    • http://www.humanitad.org/people/In PDF document text
    • http://www.truthtellers.org/biblicalanswers.htmlIn PDF document text
    • http://www.kabbalah.info/bb/why-do-people-hate-jews/In PDF document text
    • http://worldinterfaithharmonyweek.com/category/letters-of-support/In PDF document text
    • http://www.runattitude.be/running/In PDF document text
    • http://integralleadershipreview.com/table-of-contents/In PDF document text
    • http://www.raileurope-world.com/pass/britrail-pass-1In PDF document text
    • http://www.thepropheticyears.com/wordpress/david-wilkerson-predicts-riots-fires-and-looting-in-cities-worldwide.htmlIn PDF document text
    • http://uncpbisdegree.com/1/stage-4-metastatic-pancreatic-cancer-survival-rate.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-cambridge-companion-to-wittgenstein-hans-d-sluga.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-evolution-of-primary-sexual-characters-in-animals.pdfIn PDF document text
    • http://uncpbisdegree.com/1/tesccc-answer-key-science-unit-3-lesson-1.pdfIn PDF document text
    • http://uncpbisdegree.com/1/suzuki-motorcycle-owner-manuals.pdfIn PDF document text
    • http://uncpbisdegree.com/1/shark-tail.pdfIn PDF document text
    • http://riverside-resort.net/1/when-the-storm-breaks-queensland-chronicles-book-3-a-novel.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-butterfly-lion-michael-morpurgo.pdfIn PDF document text
    • http://riverside-resort.net/1/you-choose-colouring-book-with-stickers.pdfIn PDF document text
    • http://riverside-resort.net/1/zen-guitar-philip-toshio-sudo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.p12.nysed.gov/ciai/socst/grade3/glossary.htmlIn PDF document text
    • https://www.tes.com/teaching-resource/roman-comprehensions-with-answers-6099157In PDF document text
    • https://en.wikipedia.org/wiki/Culture_of_CanadaIn PDF document text
    • https://news.un.org/en/In PDF document text
    • http://www.cbc.ca/archives/In PDF document text
    • https://www.nationalgeographic.com/magazine/In PDF document text
    • https://www.economist.com/technology-quarterly/2016-06-09/factory-freshIn PDF document text
    • http://www.elca.org/In PDF document text
    • https://answersingenesis.org/dinosaurs/when-did-dinosaurs-live/what-really-happened-to-the-dinosaurs/In PDF document text
    • http://www.pbs.org/program/retired-site/In PDF document text
    • https://en.wikipedia.org/wiki/Medical_anthropologyIn PDF document text
    • http://www.wordle.net/In PDF document text
    • http://abcnews.go.com/HealthIn PDF document text
    • https://mail.google.com/mail/u/1/In PDF document text
    • http://www.faqs.org/faqs/by-archive-name.htmlIn PDF document text
    • https://www.jstor.org/subject/literatureIn PDF document text
    • https://newleftreview.org/II/109/susan-watkins-which-feminismsIn PDF document text
    • https://www.lexisnexis.com/en-us/products/lexis-advance.pageIn 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_off00004ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED4 10384 bytes
SHA-256: 4124f6fd8fd391a0769882394b8bcbf4342f7cc7679f1f3cca8dfc4ee72f5a0d
font_01_sfnt_off00006fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE0 7388 bytes
SHA-256: 6e75fb0f48970d529190f69566ec6b01103b35a476fa735cebca7c8e9b11b989