Malicious PDF — malware analysis report

Static analysis result for SHA-256 4452b00fabb315d7…

MALICIOUS

PDF

354.6 KB Created: 2022-02-02 02:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: e083ca7601e98fad892a7924ddd9272a SHA-1: 5a2c7f6ecf2b881f1b7c43ff1c5aa1a4ee3dd7f3 SHA-256: 4452b00fabb315d7420a6581a8228a66fb7d0cfb6f016129491098cac51bdc10
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress upload storage and an SEO redirector, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6641

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://sunuf.co.za/XSRYdR1H?utm_term=strong+acid+and+weak+base+pdf PDF link annotation
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/limuku.pdfIn PDF document text
    • http://flairpens.ru/uploads/file/taduvoxevakabiwaseva.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/84657552646.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/l9sphlpu8rl4uqkees35l31ff5/lulalitezewosubizoxorimo.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/65065582189.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/82552493332.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/38855376198.pdfIn PDF document text
    • http://kirpichi.su/kcfinder/upload/files/sazegumoniramir.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/58880756.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161cf141609f01---resowulelixigetesonati.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/bifasolurinarika.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/fukujofakirulo.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20211120220232.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/kefozebagapizejoxuzikuf.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161417123bc5b2---pekamegobobiraze.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/loribi.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/17064504405.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/737d2e397b7fc7fa803ed26d9cd827fe/korujezotusebaxugunera.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/xidagirenux.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616f74a835091---57764931291.pdfIn PDF document text
    • http://nijiclothing.com/assets/ckeditor/kcfinder/upload/files/dowabojewojunan.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f6744361829---70565159188.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/puketugeruwevesekis.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/fupatu.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/pefetegowawumupufiwaluf.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/bumefapup.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/55780898319.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4f309035ac16233d56ecc3d694de8b6e/zedasapaxabop.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/61124089760.pdfIn PDF document text
    • http://www.bash.cl/media/file/55271647041.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/36053440091.pdfIn PDF document text
    • http://vsezip.ru/public/kcfinder/upload/files/25576898714.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/71907580456.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_off00051e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E83 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0005359e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5359E 16648 bytes
SHA-256: 9d504a27efb30fc8193475146fd26b1b998a42c73c152cacdad4da8237c1f175
font_02_sfnt_off000560e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x560E8 11140 bytes
SHA-256: e85d019d5872330ff06e5937e895bf93d3e812085fa3e35fd2e614d606fe0867