Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f5d6bd5d3174cf…

MALICIOUS

PDF

350.5 KB Created: 2022-03-02 01:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-28
MD5: bd23564912c7e3abcb2800e45a2a78e1 SHA-1: b9e6b701bcf2f25485e6b4cb79c481adff9965b4 SHA-256: 28f5d6bd5d3174cf26baf869005ca9b3e57c87c29dc73546c94da4d6026aff8c
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7397

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://fecuq.co.za/XSRYdR1H?utm_term=sam+darnold+nfl+scouting+report PDF link annotation
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f9c85c32350---vinabakuw.pdfIn PDF document text
    • https://www.coopi.org/admin/assets/js/ckeditor/kcfinder/upload/files/files/wilorabowunopufapaze.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/nitilewoze.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/disasamepepaw.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/gibuwokaw.pdfIn PDF document text
    • http://schwierzy.pl/uploads/files/vixojozefido.pdfIn PDF document text
    • http://elmarahtravel.com/public/kcfinder/upload/files/turajezomo.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/bosiwezatarikiwiwerovim.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1621b493a53e54---65358154044.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/70092294961.pdfIn PDF document text
    • http://test.xn--b1adbeobutb0arf.xn--p1ai/kcfinder/upload/files/pevazenulatinexumetetef.pdfIn PDF document text
    • http://man-shoes.moscowfashion.net/content/xuploadimages/file/79053348163.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16203e3b3ea0a5---nogokakid.pdfIn PDF document text
    • https://jfd.news/app/webroot/uploads/files/boguzalukikeget.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/17964043197.pdfIn PDF document text
    • https://cira.thinkabit.net/downloads/files/vusiwaju.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/magutamas.pdfIn PDF document text
    • https://riwg.in/userfiles/file/6387741961.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/ff65e5fb7937c1990f5268be9991ae96/zejipive.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/99113577731.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16212ab8411cf7---fowixomoguxujevunipo.pdfIn PDF document text
    • https://sk-elektron.ru/ckfinder/userfiles/files/93740962578.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/30481142914.pdfIn PDF document text
    • http://yingtailong.com/upload/file/22030115120678251098hkhz0e08jj.pdfIn PDF document text
    • https://xn----7sbbzeackusl5afk8czi.com/admin/kcfinder/upload/files/mumuxi.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/91389246991.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/44742954069.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/redunonosa.pdfIn PDF document text
    • http://agrariusnet.hu/admin/ckeditor/kcfinder/upload/files/23360299048.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_off00050a1d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00050a1d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A1D 18044 bytes
SHA-256: 68629a182ee0b2ec6921ca37ab82af13c7c5755c302d4c07702ba5ed8f8dc11b
font_01_sfnt_off00053890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53890 11136 bytes
SHA-256: fba16302c159f4e362a34da9591115c6c4df5282aca7e162c21638f870c6492b
font_02_sfnt_off0005525a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5525A 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9