Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e55f23966c108c4…

MALICIOUS

PDF

35.6 KB Created: 2018-06-11 08:53:34 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 9fa751bc6a3c6197a4760219f343818f SHA-1: 2d1932e648ab5b92172540cc2013f074a6528748 SHA-256: 1e55f23966c108c45fc5f7b3113634b7122bbaab02319b9a7295105852eefa75
130 Risk Score

Malware Insights

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

The PDF document contains a high-confidence ML classification indicating maliciousness. It also features an embedded URI pointing to 'uncpbisdegree.com/download3.php', which is likely a lure to download a secondary payload. The presence of a visual download button further supports the social engineering aspect of this attack. No scripts were extracted, but the overall structure and embedded URL suggest a downloader or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9062

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=used-2004-ford-expedition.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=used-2004-ford-expedition.pdfIn PDF document text
    • http://www.originalwheels.com/ford-wheels/expedition.phpIn PDF document text
    • http://www.originalwheels.com/ford-wheels/In PDF document text
    • http://www.usedpartsmiami.com/category/ford/In PDF document text
    • https://www.middletonford.net/In PDF document text
    • http://riverside-resort.net/1/unexpected-gifts-a-castle-mountain-lodge-romance-book-1.pdfIn PDF document text
    • http://riverside-resort.net/1/z-machine.pdfIn PDF document text
    • http://riverside-resort.net/1/wiring-diagrams-1956-ford-t-bird.pdfIn PDF document text
    • http://riverside-resort.net/1/wild-card-elite-ops.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solution-dual-slope-integrating-type-dvm.pdfIn PDF document text
    • http://riverside-resort.net/1/vlsm-addressing-box-method-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/world-history-holt-chapter-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/weight-watchers-healthy-food-for-hungry-families.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-iron-hand-of-mars-falco-4.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-great-depression-facts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.edmunds.com/used-ford-expedition/In PDF document text
    • https://www.edmunds.com/used-cars-for-sale/In PDF document text
    • https://www.edmunds.com/used-ford/In PDF document text
    • https://www.cargurus.com/Cars/l-Used-Ford-Expedition-d333In PDF document text
    • https://www.cargurus.com/Cars/forsaleIn PDF document text
    • https://www.edmunds.com/ford/expedition/In PDF document text
    • https://www.edmunds.com/new-cars/In PDF document text
    • https://www.edmunds.com/ford/?ps=newIn PDF document text
    • https://www.autolist.com/ford-expeditionIn PDF document text
    • https://www.cars.com/shopping/ford-expedition-2016/In PDF document text
    • https://en.wikipedia.org/wiki/Ford_ExpeditionIn PDF document text
    • https://www.kbb.com/ford/expedition/In PDF document text
    • https://www.carid.com/ford-expedition-accessories/In PDF document text
    • https://www.carid.com/shop-by-product/In PDF document text
    • https://www.carid.com/ford-accessories/In PDF document text
    • http://www.nadaguides.com/Cars/2004/FordIn PDF document text
    • http://www.nadaguides.com/Cars/2004/CarIn PDF document text
    • http://www.nadaguides.com/Cars/2004/Ford/SUVIn PDF document text
    • http://www.nadaguides.com/Cars/2004/Ford/CarIn PDF document text
    • https://www.carid.com/2001-ford-expedition-accessories/In PDF document text
    • http://www.motortrend.com/cars/ford/expedition/2005/In PDF document text
    • http://www.motortrend.com/cars/In PDF document text
    • http://www.motortrend.com/cars/ford/In PDF document text
    • http://www.motortrend.com/cars/ford/expedition/In PDF document text
    • https://www.carsdirect.com/2018/ford/expeditionIn PDF document text
    • https://www.truecar.com/prices-new/ford/expedition-pricing/In 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0E 10628 bytes
SHA-256: d2bc737293ebd9f2aaa42feffa49914e835cc5e77af789863755be11d191360c
font_01_sfnt_off00006fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC0 7016 bytes
SHA-256: 36595757f6c6d7f418022bd811868718472f0b66c13f8d66f0f1ea56561d9739

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