Malicious PDF — malware analysis report

Static analysis result for SHA-256 634f788ddab7bae2…

MALICIOUS

PDF

429.6 KB Created: 2022-03-22 21:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: 32e8fe7626c9df9593b216d7a08a5e01 SHA-1: f7643bc4c5795500f2c64144fcb06bdd74fa0fbd SHA-256: 634f788ddab7bae288531aa85c9ff19e9b912fdc2f7d40add8777e4ebce63b03
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4850

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16234e52b6a3ad---4871374212.pdf In PDF document text
    • http://rendszerguru.hu/admin/kcfinder/upload/files/nonajune.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16212cbfda9264---gureradilubiwemuxijabiju.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/30486870127.pdfIn PDF document text
    • https://www.prashantgroup.com/admin/kcfinder/upload/files/miwajosivegagomadopulapus.pdfIn PDF document text
    • https://www.ibbfvhn.org/recursos/kcfinder/upload/files/begukudaposikutosove.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/zumovewasepaxupatutetob.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16227ad47b144e---18651645987.pdfIn PDF document text
    • http://abmys.org/kcfinder/upload/files/31770284812.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/rokaxawi.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620b5aa88f01e---62597330297.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16222c70da7cd6---49447865028.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/69248324575.pdfIn PDF document text
    • http://starroadchina.com/userfiles/file/94315182047.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/zisijinegi.pdfIn PDF document text
    • https://myleague.vn/uploadfiles/kcfinder/files/20502993052.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/784d8fc90c23ec65eee5f6799e2e8a44/ragudizufivigafukasi.pdfIn PDF document text
    • http://dinapart.net/frontend/web/kcfinder/upload/files/60202598114.pdfIn PDF document text
    • http://www.acs-pack.fr/kcfinder/upload/files/napapi.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16232f37731ec4---jafifuwip.pdfIn PDF document text
    • http://elmarahtravel.com/public/kcfinder/upload/files/31163585827.pdfIn PDF document text
    • https://quintafontearcada.com/admin/ckeditor/kcfinder/upload/files/85561208927.pdfIn PDF document text
    • http://bytip.net/filespath/files/20220317020338.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/xubefekutad.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/162305c47545fb---84946330708.pdfIn PDF document text
    • http://www.fairvalesecondary.co.za/kcfinder/upload/files/63560336987.pdfIn PDF document text
    • https://bclowermainland.gocascadia.com/images/cms/file/kejijifali.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/gozatedifezijiz.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/magujebevizizefidevozefop.pdfIn PDF document text
    • http://playos.net/data/playos.net/uploadfiles/file/53840345574.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/94568692228.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/fajevumasuxaseke.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/35953240333.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/virapixi.pdfIn PDF document text
    • https://gatia.kone-equicentrum.cz/userfiles/files/wukutuvufenejezigasu.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/6181224694.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/77794968353.pdfIn PDF document text
    • https://windscrm.net/files/file/11525982049.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/riwafu.pdfIn PDF document text
    • http://pollibox.com/assets/uploads/files/lurifosadatukijir.pdfIn PDF document text
    • http://smogy.ru/files/files/89787069737.pdfIn PDF document text
    • https://nisseiplastic.com/up_images/exp/files/39502959221.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/sezaj.pdfIn PDF document text
    • https://lazav.co.za/XSRYdR1H?utm_term=rosen%27+s+emergency+medicine+pdfPDF link annotation
    • https://www.fondazionepolis.it/blog/ckeditor_fullcolor/kcfinder/upload/files/fefil.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
    +3 more URL(s)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000647eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647EB 17992 bytes
SHA-256: bcee40e474d65049dd48d3cbdae1c072a6381439f1ff173ca14857fefa2467c1
font_01_sfnt_off00067624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67624 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00068d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D44 10848 bytes
SHA-256: e5e9884dc1ba23681be9279d7aaa879643f67678e3aa668940ccdbd73151beaf