Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257feebb8d586df…

MALICIOUS

PDF

544.4 KB Created: 2022-02-08 02:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: bf7daa03f89c80bef111d755c24c4b58 SHA-1: 6bdc145ed3ea274d8bd098a3cdc0cd7c29d2becc SHA-256: 4257feebb8d586df57fc836dbb901ff7b5661a9c5a831614fed7251eeb16ebeb
144 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3152

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.
  • 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.
  • 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://norin.co.za/XSRYdR1H?utm_term=codycross+answers+group+245+puzzle+3 PDF link annotation
    • http://saringkarnwood.com/UserFiles/file/xagidilebeburi.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/12367311275.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/96683211487.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/mudamakixafikibisazikubo.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f4acde84f32---17608662977.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/ruxelikex.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/73114380034.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/banolijite.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/zunugekenize.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/dututugujuf.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1614549d356828---58417003501.pdfIn PDF document text
    • https://ver9.sonikgps.com/ckfinder/userfiles/files/29166061761.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/54783764093.pdfIn PDF document text
    • http://anpo.vn/upload/files/81459793315.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/64730453263.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/dimoligupusobozajon.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/bikozak.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/77724675342.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/24163529500.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/jajosuvarusogeveluzijiz.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ua1rhb07l1dbm8d2bjronq8b34/zivemo.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161f059ba0f4f8---wakafupobozuwoviniwupal.pdfIn PDF document text
    • https://ancoraeducacion.com/images/burigagenokalofazapiwazax.pdfIn PDF document text
    • http://wdnederland.nl/file/vetijawif.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e327d164eeef1e181513773b2c11316f/73080307568.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021090905154473499.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/55746566192.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/berepiwuzajifo.pdfIn PDF document text
    • https://avflash.nl/upload/files/49354426335.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/javidabopitozuvoxuzuwonax.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/xilorozeverumetigopodim.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/ropubitoxunazitelozafipu.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/nupuwidajuvuleneso.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/14963606126.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/61372756101.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/88644887579.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_off0007f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F795 18076 bytes
SHA-256: 6d36e22ed4ce19d6c360e334655cb454dd2aaaefa2cef6eece5ef17893e9d551
font_01_sfnt_off00082527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82527 7556 bytes
SHA-256: b7700f8669636cf5b1c9c6c577dd96c108f8117147be3ab08f89820aa99b7ac7
font_02_sfnt_off00083ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC5 11396 bytes
SHA-256: 61ab445e703021888c3b67bfadaf4980d8b7377ecd9992ccbf848504be6ab542
font_03_sfnt_off000859d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859D6 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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