Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdb8efc103da49c…

MALICIOUS

PDF

294.4 KB Created: 2022-02-11 08:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-15
MD5: 459765169d689bac67f235e543c87c47 SHA-1: 5322d5a1fc21074146f9f1f541316d0f4219e4b6 SHA-256: 4cdb8efc103da49cabb4ff2d336da5e87281ef38731436e5feec5d591ca7acb1
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6289

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
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://podar.co.za/XSRYdR1H?utm_term=inorganic+chemistry+lecture+notes+pdf PDF link annotation
    • http://icsbc.ru/fuploader//file/surinafuvoru.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/fexazuxiwirifetuw.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/f628b04cc40e950a0c26900d175e4087/tazuvegaluzarexinaximepes.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/dopiragogesiroti.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/gumil.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/53678036247.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/80348753235.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/xipuwajaruwisetulobovefow.pdfIn PDF document text
    • http://aibrpjoaae2.specialty-match.com/upload/files/xujivag.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20211021083621.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/20163885669.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/25768628273.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/161df41e69a65a---74879048491.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/rusew.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/11007488623.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/mexusevudefoderomuvepifo.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139785f42c54---zozelomegejaxab.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/08c17780397fe3f6b57acd9659c27c09/vuguzutifoxanuduvugo.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20220123_A8A2F07908EA16D9.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/vudurofajubawus.pdfIn PDF document text
    • http://www.bauernmusikkapelle-stjohann.at/CMS/ckeditor/kcfinder/upload/files/kabudonanoxuzavopiwapadal.pdfIn PDF document text
    • https://alexspa.kaszebe.com/userfiles/file/jikovekafit.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/20221142112352313.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/1e1g3ggjk8atrmo9lvairljhdq/voxuxiripedijutaduvo.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/35291608756.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/97029178618.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/5991865024.pdfIn PDF document text
    • http://ailin.kz/js/kcfinder/upload/files/92403433670.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/sowipofenuxaguwijiti.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/61980527035.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_off00042657.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00042657.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00042657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42657 11232 bytes
SHA-256: 3da3680d82797b08590af79b250f7ff0fa059d4f74c465ff8a6a93417e49311e
font_01_sfnt_off0004404c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4404C 19240 bytes
SHA-256: 0ea2faaa693c65c9e4c4a522037579bba9dc9c7074d59e8b62f6741eaeb7270e
font_02_sfnt_off000472c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x472C7 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9