Malicious PDF — malware analysis report

Static analysis result for SHA-256 8755a7bf837ec653…

MALICIOUS

PDF

522.8 KB Created: 2022-03-16 13:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-04
MD5: c18bd66f8ff4787284fcba7e357fcdd9 SHA-1: 20c91da1b71bba9986235d7265721aa5a0d41770 SHA-256: 8755a7bf837ec65329483467957a41fa5fd1ca99a6a51aad2dbd04b22a17598e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4183

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 http://fantalife.nl/userfiles/file/lufodigiras.pdf In PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f0fedbc1445761391fda6f214ee313b5/35866866966.pdfIn PDF document text
    • http://affichage-comevents.fr/kcfinder/upload/files/42164744642.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/162225a5e240fe---33281099157.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/kusebodenidule.pdfIn PDF document text
    • http://www.e-glasso.pl/galeria/files/nurojojuverola.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/83860197116.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/pawoweregeb.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/28867491312.pdfIn PDF document text
    • http://synhbio.com/upload/files/siruzabaguwasajewu.pdfIn PDF document text
    • http://beibarys.com/app/webroot/js/kcfinder/upload/files/vokavabiwutixomalipox.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/ad3ba8ba23b056699b4b3d95c97c4f77/20351499111.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/16003231376.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/padujazomenivurofi.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/3418449421.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/mexenedarala.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/josiwofulozo.pdfIn PDF document text
    • http://ebara.com.hk/ckfinder/Zenith/userfiles/files/12895909816.pdfIn PDF document text
    • https://parokaonline.hu/upload/files/63483678857.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16212d75aacc4e---42936710629.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/vopupeg.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/99167333147.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/19396673890.pdfIn PDF document text
    • http://brenderup.ro/mm/file/wuxelikowejoko.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/22ac0310f1993f2d4f65eb525d9acd87/19997680424.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/pitamabep.pdfIn PDF document text
    • https://egraph.fts-eu.com/userfiles/file/5461268538.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/46234345994.pdfIn PDF document text
    • https://yoyep.co.za/XSRYdR1H?utm_term=family+english+worksheet+pdfPDF 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_off0007bac8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0007bac8.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0007bac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAC8 18388 bytes
SHA-256: ddc86e37a698c671b5bad9d8cf2e65c011408efbaa2da4e15ea865cc26fe1ed3
font_01_sfnt_off0007eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAF1 11212 bytes
SHA-256: 5934a51e160cce1aa213e76bc6fa574a21a5e6a8291992bf5f06ebb346fa4db4
font_02_sfnt_off000804da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804DA 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9