Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dab18d41f6bbd91…

MALICIOUS

PDF

30.7 KB Created: 2018-06-11 09:25:12 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 54cfc58c437cf06ed92f3baa702dcdd7 SHA-1: 508f571644e134f0602c989ad45a4e091c2355e3 SHA-256: 2dab18d41f6bbd91376f9d045e3b90b2a1796cb60a3b3e8781ae10547e505485
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9350

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=uniden-gmr2240-2ck.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=uniden-gmr2240-2ck.pdfIn PDF document text
    • http://riverside-resort.net/1/the-ticket-that-exploded-nova-trilogy-2-william-s-burroughs.pdfIn PDF document text
    • http://riverside-resort.net/1/the-classic-ballet-basic-technique-and-terminology.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-drn-xm01ck-satellite-radios-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/socio-economy-of-india-the-first-50-years-and-beyond-1st-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/the-gift-of-battle-sorcerers-ring-17-morgan-rice.pdfIn PDF document text
    • http://riverside-resort.net/1/sexuality-and-the-erotic-in-the-fiction-of-joseph-conrad.pdfIn PDF document text
    • http://riverside-resort.net/1/the-book-of-the-bitch.pdfIn PDF document text
    • http://riverside-resort.net/1/toyota-mr2-audio-diagram.pdfIn PDF document text
    • http://riverside-resort.net/1/understanding-construction-drawings-6th-edition-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/this-business-of-artist-management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.manualslib.com/manual/376789/Uniden-Gmr2240-2ck.htmlIn PDF document text
    • https://www.manualslib.com/brand/In PDF document text
    • https://www.manualslib.com/brand/uniden/In PDF document text
    • https://www.manualslib.com/brand/uniden/two-way-radio.htmlIn PDF document text
    • https://www.manualslib.com/manual/376794/Uniden-Gmr2638-2ck.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_off00003c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C38 10744 bytes
SHA-256: b9fd5aa1394937bc4afc1b15f75bdb88168c7997a630c38781ce2df9b74bbc4f
font_01_sfnt_off00005e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 7036 bytes
SHA-256: 5447d908a6366aedd7da7d70f12dd3f4dc904ae487a91083febe98f7c17bb87d