Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f53616ec95be73…

MALICIOUS

PDF

324.6 KB Created: 2022-02-24 00:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 5e7babfba789b716a8b3dd4aaff0bf7d SHA-1: de568371178a6eb18f536cc5b4d9d2530f9ba6f2 SHA-256: a4f53616ec95be739eeee1435ca36745e3b47087159d8b11641d89eabb8c5a48
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7024

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://colod.co.za/XSRYdR1H?utm_term=handing+in+your+notice+ireland+template PDF link annotation
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616496da8ac4e---59329292415.pdfIn PDF document text
    • http://alkanboya.com/files/file///15219941769.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/babote.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/lugozez.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/refanoferimine.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e32d0ebf5324dc052405165f0583c86e/jomumekidupavalituzaw.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161343ce4d4e5b---48791983600.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/k0irk070n3oao0cb3j1o1qpa1i/zezimuvasevenuvipegiz.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/gavirero.pdfIn PDF document text
    • https://ntm.mcapps3.cz/multimedia/file/81791849246.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/pavoja.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20220131132855.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161e567b6936b4---9222071889.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/pibumipamor.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/zoviwezewari.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/subeviger.pdfIn PDF document text
    • http://olapromos.com/ola/uploads/editorImagesfiles/65897568359.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/gagawezozevivot.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/majedimedazafo.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-10-11/20211011144852511231.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/zenorupeledupotoxa.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/92422687890.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/60719011846.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/mawiwo.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/22844905813.pdfIn PDF document text
    • https://www.conepe.org.br/public/ckeditor/kcfinder/upload/files/pepoxuziforasivuxikuwe.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/kj9ia8c9gtta24rend4kn3let2/fumasatupopevujoze.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/c16587527098acf0d841783483a2ee6d/wukapukawutepexedikex.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_off0004a419.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004a419.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004a419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A419 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0004bb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB39 10896 bytes
SHA-256: 9100d5898c28f6ed1154e52448792406acd0c94f468cfba9f200d4d856ccaefe
font_02_sfnt_off0004d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D41E 17976 bytes
SHA-256: b0f329fc5ba44993d51831de4d8fb6682a37ee17e997fb73962ccd692f8c043a