Malicious PDF — malware analysis report

Static analysis result for SHA-256 a637530e84c8360c…

MALICIOUS

PDF

241.3 KB Created: 2022-03-15 11:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-26
MD5: ba001da4fb55a589367d94a6f3b7477f SHA-1: 73676e592184af3be37811737000ce9e33466546 SHA-256: a637530e84c8360c9dd4386b086be6c0accf0c55832585e3e19ee83f8a26f5f8
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7915

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://wirut.co.za/XSRYdR1H?utm_term=upstream+c1+student%27+s+book+answers+pdf PDF link annotation
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1622956190601b---xikifesiwozodutos.pdfIn PDF document text
    • http://bc-nosingtasting.com/bestanden/files/xigajixejatuvugixo.pdfIn PDF document text
    • https://thermocalnepal.ramjanki.com/ckeditor/kcfinder/upload/files/14242226227.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/91649022841.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/162301be9c980b---ruxefezesijolug.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/fa4c888de8a8ce18d3c1d01f7da7dd5a/gokulunilo.pdfIn PDF document text
    • https://academiapreprod.riportico.com/userfiles/files/buwado.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/54dfca5567c6a63f43356ecf68eb6948/45258526649.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1622601535c75b---72203090166.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/2828460551.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/33075346120.pdfIn PDF document text
    • https://www.econiwas.com/econiwascontrol/bower_components/ckeditor/kcfinder/upload/files/lotural.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16206584ad814c---voravanoxokanifuvored.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/fukafelem.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/83015257287.pdfIn PDF document text
    • https://christschoolblr.in/userfiles/file/75595986634.pdfIn PDF document text
    • http://xn----htbccnijgu6o.xn--p1ai/kcfinder/upload/files/62806446610.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/meponomijerivatik.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/taxegajawojedujuzokogesus.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/3e189932302fc3957ed9d532e1f94c97/foniboxe.pdfIn PDF document text
    • https://beds.lifelinecenters.com/news_items/file/60354702694.pdfIn PDF document text
    • http://bukitjaya88.com/kcfinder/upload/files/2396574462.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/57757983824.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/gozulunuxoveko.pdfIn PDF document text
    • http://www.ipsc-pv.cz/kcfinder/upload/files/29058783555.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/45200755138.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1622c1472ab061---5643497871.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/62971156075.pdfIn PDF document text
    • http://bptramptour.pl/files/file/siwodokeradewigu.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/vijorumazakigit.pdfIn PDF document text
    • https://ossarentacar.cl/admin/uploads/file/sekijugozebinelikawevapa.pdfIn PDF document text
    • http://madervaf.com/admin/kcfinder/upload/files/jadiwikafavi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off00035013.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00035013.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00035013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35013 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00036733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36733 11152 bytes
SHA-256: 572562eb6093e7ac3e63cc7db0b67139af237a11249f63817bf62fa1fe8448d0
font_02_sfnt_off0003813e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3813E 19576 bytes
SHA-256: 15d64bc05d8a8b0e1ab509ac0a6c069d72fdc09e3646e18eb202ea76b63964f1