Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4530f1b654dbab5…

MALICIOUS

PDF

27.9 KB Created: 2018-06-11 08:33:18 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84343f93b0f9bbd8b0aa06a2f12e772f SHA-1: 76795d6404180911a079cec783fed4cc613f7f77 SHA-256: e4530f1b654dbab59d6c9d269f3df9e4c94d08378d8453ff42c9499431f7df91
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=she-only-wore-a-shirt-to-the-funeral-ebook-ken-haramiru.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=she-only-wore-a-shirt-to-the-funeral-ebook-ken-haramiru.pdfIn PDF document text
    • http://uncpbisdegree.com/1/tamed-by-you-laurel-heights-7-kate-perry.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-blood-pressure-solution-secret.pdfIn PDF document text
    • http://riverside-resort.net/1/zane-apos-s-z-rated-chocolate-flava-3.pdfIn PDF document text
    • http://riverside-resort.net/1/what-do-you-know-about-manners.pdfIn PDF document text
    • http://uncpbisdegree.com/1/tantra-la-sexualidad-sacr.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-golden-antilles.pdfIn PDF document text
    • http://uncpbisdegree.com/1/simple-solutions-organizers.pdfIn PDF document text
    • http://riverside-resort.net/1/we-are-going-to-pick-potatoes-norway-and-the-holocaust-the-untold-story.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sylvania-nb501sl9-dvd-players-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/what39s-the-word-answer-key-5-letters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://storiesonline.net/a/haramiruIn 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_off00003245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3245 10592 bytes
SHA-256: dbbabdd2b26c4698badf876e166fca8bc9efedadcf951dc4f37b578aba5723d7
font_01_sfnt_off000053d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D4 7228 bytes
SHA-256: e8aff6bc03fdd257349674ce9f8b1581ea48218c8aff2a59115e7b05e7ec9f53