Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fd6444a4c4e173…

MALICIOUS

PDF

268.1 KB Created: 2021-12-29 18:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: a7d31c921361afd326e33204513909e0 SHA-1: 01b2e6a7ef5d6d9840a691caca4bd6b2f32c1b5a SHA-256: a4fd6444a4c4e17382a21e95151066e203e6483809561b0f5f4bf7cd03c454fc
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8006

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vivantinvest.nl/userfiles/file/71507061578.pdf In PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/76357698537.pdfIn PDF document text
    • https://senegal4d.com/contents/files/zuzuzegelitilumunekagutez.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/4727470219.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158dbafee3eb---14188858747.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161c3dae7786db---sedowamorujomamemikelu.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/26081593448.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/goxelapu.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/momedekefodesatav.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a719aee8ed4---kuvadagiros.pdfIn PDF document text
    • https://kultmotor.hu/images/files/bekusazigim.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/61954668577.pdfIn PDF document text
    • http://info56.ru/userfiles/file/miwewijizenopesolitop.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/36249510494.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/79977894823.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/53521846199.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/7591614082.pdfIn PDF document text
    • http://coumert.com/images/file/xekomusaxodafedubor.pdfIn PDF document text
    • https://maisonfamillesrimouski.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/44832433415.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/2902168095.pdfIn PDF document text
    • http://gro-felix.si/uploads/kewikoturizezitudi.pdfIn PDF document text
    • http://dubiliergarten.de/uploads/files/57292177190.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16169dce3252c5---nuwadejofudebolimawalar.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161a6d7e588cda---miguwosefezagin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/TSvcnjQ06Jg/uplcv?utm_term=unit+conversion+worksheet+algebra+1+answer+keyPDF link annotation
    • 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_off0003c5b7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003c5b7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003c5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C5B7 11064 bytes
SHA-256: 5ae63b0e697d2c7e9eae6bf148f79e0670dd33ab5b6222a2db3c1c2606ec1a6a
font_01_sfnt_off0003df9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DF9E 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0003f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F63D 16848 bytes
SHA-256: bba199449880058272a646fdafe967a346c4060011e5ab849750767b3dd87735