Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca65cebdddc3d720…

MALICIOUS

PDF

280.8 KB Created: 2022-03-08 06:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-07
MD5: 6dbaa86c0a3c72aebc0fba36425b750e SHA-1: bf8ff53d296ab53ac8da744e83bffea4209ff626 SHA-256: ca65cebdddc3d720dd3f60ff440dad4a6b8361a46aab3a2a0a0be4281ee65884
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7513

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cbrn.tj/nrsa_system/ckeditor/kcfinder/upload/files/mamix.pdf In PDF document text
    • http://cityclick.it/userfiles/files/gomonepixumexatudevexibes.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2022/02/files/220216174405.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/tivan.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/6131502592.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/gokowujepobamaxe.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/gadeto.pdfIn PDF document text
    • https://www.pmayassam.in/assets/kcfinder/upload/files/seboxajaxatosutejix.pdfIn PDF document text
    • http://bptramptour.pl/files/file/sotarozerafiri.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/162019cd1b4834---pevudagifibegejer.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/38b77a1bc079ae375da5900b0ec4dbf9/dapowovabuniv.pdfIn PDF document text
    • http://oks.urmon.uz/kcfinder/upload/files/popolazowawaduxug.pdfIn PDF document text
    • http://ptd-tver.ru/content/files/upload/files/xevenanuni.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/fulapemetibobonadasel.pdfIn PDF document text
    • https://motelandratecuci.ballroom-andra.ro/userfiles/file/23977949217.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16221163f709b1---50176641731.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/78538102002.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/gewaxopudusadigotunukolaw.pdfIn PDF document text
    • http://hanker.ru/web/img/files/82305404953.pdfIn PDF document text
    • https://michalheger.cz/soubory/files/zozalugafoviliwedubigipe.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/xutulenidolozajo.pdfIn PDF document text
    • http://amtautotrasporti.com/ckeditor/kcfinder/upload/files/39197542589.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/56068796031.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2022-2-7/20220207074457697553.pdfIn PDF document text
    • https://www.procotech.be/ckeditor/kcfinder/upload/files/guxinel.pdfIn PDF document text
    • http://immodraft.eu/images/architekten_agentur_images_/file/liraxolokotidixutigu.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/162085264e4037---29607059066.pdfIn PDF document text
    • http://conepe.org.br/public/ckeditor/kcfinder/upload/files/vofadubu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620b6a5880022---zenemarizures.pdfIn PDF document text
    • https://powiedzdoktorze.pl/file/files/nufikudebugij.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/refazijeruxo.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/mifaxuvogeradenidajiweze.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/dabowatafezisowizik.pdfIn PDF document text
    • http://euro-service.org/kcfinder/upload/images/72816101566.pdfIn PDF document text
    • http://gamenavigator.su/userfiles/files/29589022412.pdfIn PDF document text
    • https://lazav.co.za/XSRYdR1H?utm_term=new+york+state+police+report+keyPDF link annotation
    • 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_off0003f6e6.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003f6e6.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F6E6 17348 bytes
SHA-256: 0ca07a4b49b8e66719beb43929a0112ead05b6b1a1163b3f66509d472cfc2c4a
font_01_sfnt_off0004246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4246C 10532 bytes
SHA-256: 2592a8400ea73f109e266f68dd075092dc267a68ff4b95dae72942baf2f7d9b4
font_02_sfnt_off00043cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43CB1 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9