Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0975ef24aa3f38…

MALICIOUS

PDF

28.0 KB Created: 2018-06-11 08:43:20 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 59a4cde79d26d1ea170cd30c17bef115 SHA-1: ca1368be47e91977327e2586cc701946d4ac488f SHA-256: 1c0975ef24aa3f3873da3f5ce79d75445d686f91b140f2494a2ace8fbe455fec
130 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.
  • 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=vupoint-solutions-magic-wand-jr-portable-scanner.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=vupoint-solutions-magic-wand-jr-portable-scanner.pdfIn PDF document text
    • http://riverside-resort.net/1/vocabulary-heath-earth-science-1999.pdfIn PDF document text
    • http://riverside-resort.net/1/workbook-bible-studies.pdfIn PDF document text
    • http://riverside-resort.net/1/us-secret-service-message-board.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-beatles-in-the-news-1962-1963.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solutions-for-intermediate-accounting-canadian-9th-edition.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-hour-of-god-2nd-impression.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-geography-of-love-a-memoir.pdfIn PDF document text
    • http://riverside-resort.net/1/war-occupation-and-creativity-japan-and-east-asia-1920-1960.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-englishness-of-english-dress.pdfIn PDF document text
    • http://riverside-resort.net/1/vicious-cycle-intervention-2-terri-blackstock.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EC 10560 bytes
SHA-256: 803f4d48079d46adb1b80836aa337d3a6c4512df2d791cda1f2b898121b115bc
font_01_sfnt_off0000532c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532C 7508 bytes
SHA-256: dd7bafc83d8a6c8a95e29b2a848626b146f78a713d038b7c2e151f8e52ce743c