Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e30e09c0c75ef0…

MALICIOUS

PDF

34.2 KB Created: 2018-06-11 08:07:25 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-25
MD5: ee7aece227042678a807c740048a76b1 SHA-1: d24238fee3e8bc98ab8ddc0aa84ecc8ba022dddd SHA-256: d4e30e09c0c75ef026e0a746a867e1cbc573b45762c13ed424efb236d4001d06
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document is presented as a 'solutions manual accounting warren', with embedded links and a heuristic firing for an external URI pointing to 'uncpbisdegree.com'. This domain is likely hosting a malicious payload disguised as a PDF. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9340

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=solutions-manual-accounting-warren.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=solutions-manual-accounting-warren.pdfIn PDF document text
    • http://www.livingfoodslindaloo.com/mechanics-of-materials-8e-solutions-manual.pdfIn PDF document text
    • http://www.slader.com/textbook/9781285786247-solutions-manual-for-zillwrights-differential-equations-with-boundary-value-problems-8th-edition/In PDF document text
    • http://paramountaccounting.com/In PDF document text
    • https://www.bglcorp.com/In PDF document text
    • http://www.livingfoodslindaloo.com/nrvs-service-manual.pdfIn PDF document text
    • http://www.djoni66.com/9/p/96-polaris-slt-780-manual.pdfIn PDF document text
    • http://www.freeaccountingsoftware.com.au/searchIn PDF document text
    • http://www.internships.com/search/postsIn PDF document text
    • http://buffettsbooks.com/books-by-warren-buffett.htmlIn PDF document text
    • https://www.merchantmaverick.com/reviews/intuit-payment-solutions-review/In PDF document text
    • https://www.merchantmaverick.com/review-category/merchant-accounts/In PDF document text
    • http://www.gfoaz.org/index.cfm?area=resources.presentationsIn PDF document text
    • http://uncpbisdegree.com/1/terror-in-the-skies-why-9-11-could-happen-again.pdfIn PDF document text
    • http://riverside-resort.net/1/websites-to-design-a-car.pdfIn PDF document text
    • http://riverside-resort.net/1/yamaha-yht-680-home-theater-systems-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/virology-reports-impact-factor.pdfIn PDF document text
    • http://riverside-resort.net/1/wedding-cards-designs-and-prices-in-pakistan.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sports-trivia-question-answer.pdfIn PDF document text
    • http://uncpbisdegree.com/1/social-civics-exam-3-answers.pdfIn PDF document text
    • http://uncpbisdegree.com/1/stihl-028-av-super-chainsaw-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/ten-days-in-may-the-peoples-story-of-ve-day-bloomsbury-reader.pdfIn PDF document text
    • http://riverside-resort.net/1/yo-fui-el-confesor-de-eva-peron-padre-hernan-benitez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.chegg.com/homework-help/textbook-solutions/business-accounting-s37In PDF document text
    • http://www.accaglobal.com/gb/en/member/ab/ab-archive.htmlIn PDF document text
    • http://www.dos.ny.gov/info/rulemakingmanual.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/NortelIn PDF document text
    • http://www.eeoc.gov/policy/docs/religion.htmlIn PDF document text
    • http://slatestarcodex.com/2014/06/28/book-review-the-two-income-trap/In PDF document text
    • https://www.sciencedirect.com/science/article/pii/S0167404815001388In PDF document text
    • https://www.sec.gov/Archives/edgar/data/1288776/000119312504143377/d424b4.htmIn PDF document text
    • https://mobirise.com/In PDF document text
    • https://www.google.com.au/In PDF document text
    • http://www.energy.ca.gov/contracts/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_off000048af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48AF 10824 bytes
SHA-256: 3c53fcaed3816402ab73a4d68b7dab97200e4eb1aa8cd9a330f36736c78871e2
font_01_sfnt_off00006ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE3 7152 bytes
SHA-256: 2135e901ded780064f5b26f3eb302435d4de045311ef688dc3202aeb5477e6bf