Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd18558a5fffd66…

MALICIOUS

PDF

209.9 KB Created: 2021-11-01 18:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: c1cf1e1e8ebafddca72916e319243f7d SHA-1: d2f2fa1dfe9fcd3008dacab5b776dcb83e6e7468 SHA-256: 3dd18558a5fffd66d58ccc3288733d47cc342f1bdb68f6a32b1c2231fdaadf74
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9771

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://cructi.ru/uplcv?utm_term=microscope+mania+word+search+answer+key PDF link annotation
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/161650b705f2d6---99439605115.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/godik.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/nanaropiromub.pdfIn PDF document text
    • http://adanamega.com/userfiles/file/98895744259.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/68050356478.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9b2148d25---19759340612.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/54974661687.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1617d204fc9db3---roxegebezagetik.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a58a8683f33328fc046a3f85586efc8a/37829149158.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/women.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/bekofatanamipatanela.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109192001529295.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161774156d8330---peluvelikefekugul.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/pmdcmnag9ok6avc396sbrfsfii/pebavegapaxi.pdfIn PDF document text
    • http://classtool.info/upload/files/dozaviwupe.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210926031116.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615ffe86ef2f8---lepidonomozarowub.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/36237292363.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/453069757.pdfIn PDF document text
    • http://surinmajestic.com/phya/ckfinder/userfiles/files/xenarawebapovijamale.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/tunuwowefi.pdfIn PDF document text
    • https://get.belonnanotservice.ga/away?/wp-content/plugins/formcraft/file-upload/server/content/files/161513f2846d02---75217557510.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002bda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BDA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002d5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5BC 10920 bytes
SHA-256: 3d770a125177a707f8f0a9da5dc4ce8eee853d2c3d63b4c16597f28c2cc8b8c8
font_02_sfnt_off0002eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEE7 26032 bytes
SHA-256: 7e26b50b5e3910750b102d00e064a797a1a0b1a4800405d0a7a33d7dec0623cc
font_03_sfnt_off0003309d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3309D 1780 bytes
SHA-256: cf43ea07d0e14c5dadc3c8d1a3fd6347ba51c91ab3c5d9ef8ee3d45ec84741db