Malicious PDF — malware analysis report

Static analysis result for SHA-256 4258a4b307a20372…

MALICIOUS

PDF

234.9 KB Created: 2022-03-19 09:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 43b2ae991f69a7cb99ef006dc916bb09 SHA-1: d7af449c1e495e5867998dfde197318021cf83b1 SHA-256: 4258a4b307a203720c6c86cfe7f5b9642bd7449a49db5ac0f986c8113734dcfd
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8564

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yoyep.co.za/XSRYdR1H?utm_term=google+assistant+free++for+android PDF link annotation
    • http://hzdsbg.cn/uploadfile/1645305408.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16202af22525c9---72172482400.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/pisilodusiwobibe.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/pabilas.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/93559596927.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8d5cac2646891026ed5ca47d03374af9/43535738502.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f9cd510ae66---66633322475.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1620347fd9e1cc---jewewib.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/ndg5ov0qer327j6pfa073cflp5/72604746950.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/18753350938.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621c1feb087bf---futiwopu.pdfIn PDF document text
    • https://hungarogun.hu/feltoltes/files/laburokapufudumiwexuko.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1620f1e64a103a---38047250891.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/radazupiwurezufogamaxuk.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/gozedenemudivijujuzitegis.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/zelotenefixejaridon.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/2158932019.pdfIn PDF document text
    • http://www.szinespillanat.hu/admin/ckeditor/kcfinder/upload/files/levuwedu.pdfIn PDF document text
    • http://irodaszer.lukinserv.hu/file/65456812416.pdfIn PDF document text
    • https://guanlai.tw/uploads/files/202202142109437548.pdfIn PDF document text
    • https://inprovitbolivia.com/ckfinder/userfiles/files/23103233540.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/91857164828.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/94585010671.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202202240935118724.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/wafoxenazapumilejure.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 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_off00033c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C1D 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0003533d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3533D 10568 bytes
SHA-256: 34f13f9b999efa99cb1db45bb80d8351819e4e2c1c3073b1e7973b3f2c90e362
font_02_sfnt_off00036b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36B47 19248 bytes
SHA-256: e54cec6d4c2920e5613d7f606a33a5d23ff18135187c4bf5217fc81c83c8c816