Malicious PDF — malware analysis report

Static analysis result for SHA-256 25123bee7ced8a98…

MALICIOUS

PDF

37.7 KB Created: 2018-06-11 09:41:27 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 355fd63e1f0a622c4995257ccc0e2237 SHA-1: 60b1ef7e75de7cd1259a170be2d6368c78e9c592 SHA-256: 25123bee7ced8a9827c411eb7676c0cad1930e84556d09a37832992f3839140e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded URLs that point to a domain associated with malicious activity, specifically a download link for a file named 'unit-3-macroeconomics-lesson-4-activity-24-answer-key.pdf'. The ML classifier also flagged this PDF as malicious with a high probability. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, limiting the ability to determine the exact payload or execution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9373

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=unit-3-macroeconomics-lesson-4-activity-24-answer-key.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=unit-3-macroeconomics-lesson-4-activity-24-answer-key.pdfIn PDF document text
    • http://eburnham.org.uk/western-digital-wd800lb-storage-owners-manual.pdfIn PDF document text
    • http://burnscamp.org.uk/4/8/haier-hsu-18cc13-air-conditioners-owners-manual.pdfIn PDF document text
    • http://eburnham.org.uk/4/7/harman-kardon-dpr-1001-receivers-owners-manual.pdfIn PDF document text
    • http://burnscamp.org.uk/toyota-manual-transmission-cars-for-sale.pdfIn PDF document text
    • http://www2.harpercollege.edu/mhealy/eco212i/lectures/asad/asad.htmIn PDF document text
    • http://www.roanestate.edu/catalog/?id=378In PDF document text
    • http://www.roanestate.edu/?6690-AcademicsIn PDF document text
    • http://humanknowledge.net/Thoughts.htmlIn PDF document text
    • https://homeschoolfeast.com/2018-19-co-op-class-listing-by-category/In PDF document text
    • https://www.educator.com/chemistry/ap-chemistry/hovasapian/percent-dissociation_-strong-+-weak-bases.phpIn PDF document text
    • https://www.educator.com/chemistry/organic-chemistry/starkey/introduction-and-drawing-structures.phpIn PDF document text
    • http://mastersinvest.com/newblogIn PDF document text
    • http://www.bellevue.edu/degrees/academic-catalog/course-listingIn PDF document text
    • https://www.pacode.com/secure/data/022/chapter4/chap4toc.htmlIn PDF document text
    • http://www.moneyrelationship.com/retirement/the-average-net-worth-of-americans-where-do-you-stand/In PDF document text
    • http://hamburggermany.men/Hamburg-Germany/Hamburg-Germany_bq.phpIn PDF document text
    • http://cpds.apana.org.au/Teams/Articles/globalization.htmIn PDF document text
    • http://uncpbisdegree.com/1/the-arabian-art-of-taming-and-training-wild-and-vicious-horses.pdfIn PDF document text
    • http://uncpbisdegree.com/1/suzuki-dt55-outboard-service-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/visiting-card-design-cdr-vector.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-hangmans-daughter-1-oliver-potzsch.pdfIn PDF document text
    • http://uncpbisdegree.com/1/statistics-through-applications-teachers-edition.pdfIn PDF document text
    • http://uncpbisdegree.com/1/signals-and-systems-tutorial-guides-in-electronic-engineering-closed.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sweet-16-chemistry-gases-tournament-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/what-female-comic-book-character-are-you-quiz.pdfIn PDF document text
    • http://riverside-resort.net/1/windows-server-2008-for-dummies.pdfIn PDF document text
    • http://riverside-resort.net/1/x-men-noir-mark-of-cain-gn-tpb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/ScientologyIn PDF document text
    • https://open.lib.umn.edu/principleseconomics/chapter/14-1-price-setting-buyers-the-case-of-monopsony/In PDF document text
    • http://exploredegrees.stanford.edu/graduateschoolofbusiness/In PDF document text
    • https://en.wikipedia.org/wiki/CapitalismIn PDF document text
    • http://www.k-state.edu/economics/staff/websites/nafwayne/endquestions.docIn PDF document text
    • https://view.officeapps.live.com/op/view.aspx?src=http%3A%2F%2Fwww.k-state.edu%2Feconomics%2Fstaff%2Fwebsites%2Fnafwayne%2Fendquestions.docIn PDF document text
    • https://www.tru.ca/programs/courses.html?letter=EIn PDF document text
    • https://apcentral.collegeboard.org/In PDF document text
    • http://oll.libertyfund.org/titles/kirzner-the-economic-point-of-view-1976In PDF document text
    • https://www.macalester.edu/registrar/schedules/2018fall/class-schedule/In PDF document text
    • http://www.stonybrook.edu/summer-session/courses/results/In PDF document text
    • https://libraries.psu.edu/databasesIn PDF document text
    • http://www.loot.co.za/index/html/index3508.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5421 10880 bytes
SHA-256: defade1a823b7e947427254c575b770254baa7e2180184165908f57900cdb79e
font_01_sfnt_off00007697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7697 7552 bytes
SHA-256: 1d03ff1a99f58bca47f5fe4a8c2e410dc2a16e0eb8eeb3aad6254a4307f7dfaf

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