Malicious PDF — malware analysis report

Static analysis result for SHA-256 478535f3d73f7b05…

MALICIOUS

PDF

253.7 KB Created: 2022-02-03 18:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: b979e139ac3882a18f6e9dbbf2640427 SHA-1: c5387a2468f19b68d2b4c2576f4ae16dc81d6b77 SHA-256: 478535f3d73f7b05db48896174d37f8fd594450eb82b34cd5b97f6f82a57a023
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7103

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
  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://yubit.co.za/XSRYdR1H?utm_term=c+form++mp PDF link annotation
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/31337315784.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/surorojafipu.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/87257320443.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20211225164840_rtcm9z.pdfIn PDF document text
    • http://fpmalyon.belikenoone.com/media/kcfinder/upload/files/75031632465.pdfIn PDF document text
    • https://www.akita-tourism.com/assets/admin/plugins/kcfinder/files/timujazik.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16189005112241---98440981872.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/raputoroxotoledi.pdfIn PDF document text
    • http://elsped.hu/files/file/40040336825.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/96829650994.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/9a605b62759edb8bf052de7ec930e63d/33432844405.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/duxexufiwefatuvukivepabo.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/97516504271917232d62b700fe6fcadf/33600902827.pdfIn PDF document text
    • https://projetovm.com/uploads/files/67492847303.pdfIn PDF document text
    • https://airbays.com/userfiles/file/bovebojikakoz.pdfIn PDF document text
    • http://universityjournals.org/app/webroot/js/kcfinder/upload/files/fuxotikebexoko.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/sijiguwogufitanixafowijad.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/ditiwutonirojuxaret.pdfIn PDF document text
    • http://edelstar-mos.ru/files/74149861660.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/lujoganenemujes.pdfIn PDF document text
    • https://tkaniny-svitap.cz/kcfinder/upload/files/54779342182.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/6318532890.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///63294741087.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/2v9genll9boge78ruseue8a0u2/xubudewiduzunumegiwoluxe.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/tuxopubavufupibelad.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.netReferenced by PDF JavaScript
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseReferenced by PDF JavaScript

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003901c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3901C 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0003a737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A737 16804 bytes
SHA-256: 8a5bb4dc2921cd7392d4459a0160a6ed53a4751f867b2b2382a6dce7c0cd07cb
font_02_sfnt_off0003d302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D302 9748 bytes
SHA-256: 5a078244631dee769d282a907e77eeec180080b04adce33d07c15461b3011a99