Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f14312a72d0d9c9…

MALICIOUS

PDF

32.9 KB Created: 2018-06-11 09:22:07 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 36f0aaa069bf27746d252929f978710d SHA-1: 4d7cb1fb1b6b87b54a1d85e16ec5a470dcc026ff SHA-256: 3f14312a72d0d9c9db73cce50b84ff8b318851fd326310e9178b0ef18e930014
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains embedded URLs that are suggestive of a download lure, specifically pointing to 'download3.php' and 'download4.php' on 'uncpbisdegree.com'. The ML classifier flagged this PDF with high confidence, and the presence of a visual download button heuristic further supports the malicious intent. The document body, though partially corrupted, contains references to these URLs and the 'tudor roses' theme, likely used as a pretext to entice users to click the malicious links.

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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=tudor-roses.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=tudor-roses.pdfIn PDF document text
    • http://tudorhistory.org/henry7/In PDF document text
    • http://royalcentral.co.uk/historic/red-roses-and-white-a-brief-history-of-the-tudor-rose-55675In PDF document text
    • http://www.tudorhouseofflowers.co.nz/In PDF document text
    • http://www.primaryhomeworkhelp.co.uk/tudors/waroftheroses.htmIn PDF document text
    • http://www.tudorplace.com.ar/aboutHenryVII.htmIn PDF document text
    • http://www.tudortalkandcatwalk.com/a-tudor-christmas/In PDF document text
    • http://onthetudortrail.com/Blog/In PDF document text
    • http://warsoftheroses.com/In PDF document text
    • http://www.yeomenoftheguard.com/glossary.htmIn PDF document text
    • http://www.collectable-china.co.uk/?tag=royal-tudor-wareIn PDF document text
    • http://onthetudortrail.com/Blog/resources/life-in-tudor-england/tudor-hygiene-part-1-bathing/In PDF document text
    • http://www.tudors.org/undergraduate/tudor-monarchy-and-its-critiques/In PDF document text
    • http://www.historyundressed.com/2011/09/elizabethan-fun-facts.htmlIn PDF document text
    • http://www.cosmicelk.net/tudorbastard.htmIn PDF document text
    • http://www.house-martin.com/In PDF document text
    • http://www.historicalnovels.info/Renaissance.htmlIn PDF document text
    • http://www.historyofwar.org/articles/wars_roses.htmlIn PDF document text
    • http://www.vicstaterosegarden.com.au/about-our-roses/rose-storiesIn PDF document text
    • http://riverside-resort.net/1/symptoms-of-internal-bleeding-from-xarelto.pdfIn PDF document text
    • http://riverside-resort.net/1/the-flying-pizza-and-other-primary-school-assemblies.pdfIn PDF document text
    • http://riverside-resort.net/1/solution-manual-probability-and-statistics-for-scientists-engineers-by-devore.pdfIn PDF document text
    • http://riverside-resort.net/1/sixth-grade-science-fair-project.pdfIn PDF document text
    • http://riverside-resort.net/1/taking-a-chance-the-restoration-series-book-3.pdfIn PDF document text
    • http://riverside-resort.net/1/solutions-manual-for-organic-chemistry-2015-928-pages.pdfIn PDF document text
    • http://riverside-resort.net/1/setswana-memorundum-2018-nov-exqminations.pdfIn PDF document text
    • http://riverside-resort.net/1/tully-paullina-simons.pdfIn PDF document text
    • http://riverside-resort.net/1/study-guide-for-human-anatomy-physiology-answers-chapter-7.pdfIn PDF document text
    • http://riverside-resort.net/1/survivor-c.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/Tudor_roseIn PDF document text
    • https://en.wikipedia.org/wiki/Tudor_style_architectureIn PDF document text
    • http://www.bbc.co.uk/wales/history/sites/themes/periods/tudors_03.shtmlIn 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_off00004508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4508 10956 bytes
SHA-256: 6eeda014594ff75cf9ad7631714606b20c859a69a871ab96283309b03f87d901
font_01_sfnt_off000067b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 6404 bytes
SHA-256: 91a34eb64c99769481b4ae09f54208f2dfbc84cea1cdfcff2b557e8abd2160a2