Malicious PDF — malware analysis report

Static analysis result for SHA-256 338be975d7c19c9d…

MALICIOUS

PDF

27.9 KB Created: 2018-06-11 09:14:16 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 6117c60258b60d0faabf577d48c36ca4 SHA-1: 99bb154a6580923a76bf3177fe6c077581ff9974 SHA-256: 338be975d7c19c9de333546d9efcf0f67ae2f066e49c01dcb6222ad71db00fe4
102 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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=the-princess-of-dhagabad-anna-kashina.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=the-princess-of-dhagabad-anna-kashina.pdfIn PDF document text
    • http://riverside-resort.net/1/the-form-book-flat-annual-for-2007-including-all-the-2006-returns.pdfIn PDF document text
    • http://riverside-resort.net/1/trading-is-a-business.pdfIn PDF document text
    • http://riverside-resort.net/1/texas-tanker-endorsement-study-guide.pdfIn PDF document text
    • http://riverside-resort.net/1/toyota-vios-service-price.pdfIn PDF document text
    • http://riverside-resort.net/1/texas-state-trooper-exam-study-guide.pdfIn PDF document text
    • http://riverside-resort.net/1/thermo-king-service-manuals.pdfIn PDF document text
    • http://riverside-resort.net/1/the-manga-tarot.pdfIn PDF document text
    • http://riverside-resort.net/1/stihl-km-90-r-repair-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-cambridge-translations-of-medieval-philosophical-texts-vol-3-mind-and-knowledge.pdfIn PDF document text
    • http://riverside-resort.net/1/the-violence-volcano-reducing-the-threat-of-workplace-violence.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/List_of_novelists_by_nationalityIn 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_off0000322d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322D 10604 bytes
SHA-256: 3d9d2117e7421f9173a6ce509233d0541a3a6fb1d62d5a433ae2dbec92ad111b
font_01_sfnt_off000053b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B0 7216 bytes
SHA-256: 5c73790e37dbf4d50a0bf1dec0ce55612525285dd16ad6bbbfffee8e96a758e2