Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8090c4f7cae098…

MALICIOUS

PDF

279.4 KB Created: 2022-02-01 10:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: a65d2b157e82d6c0f083de2335ab1637 SHA-1: d3ccd860f59a9c6b0ddecf52907b35dadeacb0ae SHA-256: cb8090c4f7cae098ba3ee76b57dc19457256f14de5ea64187c5efad19cd4221f
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7560

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://mifuj.co.za/XSRYdR1H?utm_term=rpf+ancillary+answer+key+sarkari+result PDF link annotation
    • http://nabisori.com/userfiles/file/xutivifigenamo.pdfIn PDF document text
    • http://www.rbn.org.np/public/admin/plugin/kcfinder/upload/files/24908245767.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/98313448389.pdfIn PDF document text
    • http://xn--jt2b56wn0ap2a.com/upload/file/202201280756584360.pdfIn PDF document text
    • http://ave-france.com/pics/files/38684585013.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/wusefagadomodenaxogug.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/resutebaga.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/mimisutovidatetora.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/wovisawelevu.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/digibefegixujufubedin.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/pujirodiwidomodeki.pdfIn PDF document text
    • https://covoiturage.ce-gkn-arnage.fr/assets/uploads/files/gewegugorusilawezaser.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/degolibizit.pdfIn PDF document text
    • https://santeh.md/img/files/femuvebagasifigul.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/pesanatiwubusuxumi.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/fiwirebofojimogusida.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/57980976594.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/31172359865.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/99746485411.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ce4ac6e98b5---luturo.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161535b662b22e---zizemad.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/mebaje.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/s03s9lhp1s99mdiighn7rg6m35/vexoxa.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/35613723260.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/bosaxuv.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/47661886625.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/tuvapikimifudojozo.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_off0003f348.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003f348.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F348 16536 bytes
SHA-256: 95b6982880e25e44d9bb2803e0dbe66fb9d4a112c53de25362f82e1b0f325975
font_01_sfnt_off00041e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41E47 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off000434eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x434EB 10792 bytes
SHA-256: 257b5080074eb1f572ca9239cd6a6afbabf6668f641342eb74126d28b89fbcba