Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e305fd9d56fd9d0…

MALICIOUS

PDF

344.1 KB Created: 2022-01-09 11:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: c68bb0c7c6f3f909bd46d5ea148a4d39 SHA-1: dd34e375645170cdb1a88f41b15c1331cbc743fa SHA-256: 4e305fd9d56fd9d06ce64f21209f8bb27d396e65b10eb26a865d8614e44cc8ab
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://studybrilliant.online/app/webroot/img/userfiles/file/99516216672.pdf In PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/85376432626.pdfIn PDF document text
    • http://www.vdd.gov.np/public/kcfinder/upload/files/fazepajofudizuwefilegav.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20211112_211638.pdfIn PDF document text
    • https://rozetki-merten.su/kcfinder/upload/files/40563230086.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/legunatogesa.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/81484596760.pdfIn PDF document text
    • http://hig-hegmann.de/userfiles/file/55227106357.pdfIn PDF document text
    • https://campestrechihuahua.com.mx/kcfinder/upload/files/37831077898.pdfIn PDF document text
    • http://netpart.hu/kcfinder/upload/files/2860309208.pdfIn PDF document text
    • https://aokman-drive.com/d/files/96796055936.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///sigilujul.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/sizonorolavuroxesuxeve.pdfIn PDF document text
    • http://dsfly.com/uploads/files/tawosamebefikuxis.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616fc59373b1c---kozilosulinazuwosi.pdfIn PDF document text
    • http://standardamulet.com/files/files/sosukid.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615702ff9940d---zejibibuguginuzo.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/dajanilexe.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/xenos.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161c25de0d0918---17293853683.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/619c0d62a8600.pdfIn PDF document text
    • http://investmedic.com/app/webroot/assets/js/kcfinder/upload/files/70805319774.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/vigazu.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/zokebosage.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/xofadomadipaga.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/oscUj7J0Gjw/uplcv?utm_term=california+acknowledgement+form+2017PDF 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED8E 18492 bytes
SHA-256: 9e1472642922f8fef91cea48920e85473b54fd04c75fd5b9728e3c181c95d483
font_01_sfnt_off00051e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E63 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00053507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53507 11204 bytes
SHA-256: 01ebbc393c28bb89a76cee5d74b7109025efa9309f2299b935cb4395a58408ff