Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99c8656b787ea14…

MALICIOUS

PDF

424.3 KB Created: 2022-03-10 07:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 57c8f90c011e22a7b02f8d2fd9044abe SHA-1: 497b4506b7a1f8e7da2fca8881545a5eb440beb5 SHA-256: f99c8656b787ea14307b9bb3f99d4cdaa5413deb4cc4f176ddc03dfffcb4fa4b
144 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4712

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=growth+of+coliform+in+urine PDF link annotation
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/1550297ef3b40b8b19a508151c0e3040/ludevetelogixikusinid.pdfIn PDF document text
    • http://strap.sk/uploads/file/90257069565.pdfIn PDF document text
    • http://www.halabicaguitars.com/gfx/administration/js/ckeditor/kcfinder/upload/files/89463505906.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20220307093134.pdfIn PDF document text
    • https://tiad-mtm.com/assets/admin/js/plugins/kcfinder/upload/files/zujatoranoje.pdfIn PDF document text
    • http://hayfidan.com/admin/kcfinder/upload/files/wobodejovemakib.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/cdda05ccdc4f2a06beccbd8208c4fb2f/61893020372.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/rosalonopitisevimivi.pdfIn PDF document text
    • https://baschin-heizung.de/meineBilderAlbertGrundschule/file/64577523597.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/93713713329.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/83743586251.pdfIn PDF document text
    • https://www.zwaanshoek.info/gibreto-cms/xcrud/editors/kcfinder/upload/files/96439831508.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/162000eed5b4cf---91077677749.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/162061843a5cc1---38258841173.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/fofudumetavuturepi.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/87104420436.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/lemad.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d82881262e31e0a96f4e7ce33516ea1f/45991061891.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/wipilifejuporebu.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/3062140698.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/bevipabubenoriduf.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/tatuxawinadirerox.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/kikurevibuzotineram.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/dc78aa3f86aee4ea7763ce3c556fdc5f/37016136772.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/lububolimijoruxeto.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2022021719564173499.pdfIn PDF document text
    • http://tothimi.com/admin/kcfinder/upload/files/12762550478.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/42769198632.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/gilomatikapiwojirubekenu.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/60556436180.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/zekoboditisuwaloka.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_off000636a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A0 17128 bytes
SHA-256: 77491612aa7286f365c3f4b01cb3431fc885db4e6afd02b4daf8f18f744d99e8
font_01_sfnt_off00066315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66315 10496 bytes
SHA-256: aacd9f5a4f0bf75f6a5fe4beff7f7bff2d8615b1765d52132d510ff1f9c4cb47
font_02_sfnt_off00067acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67ACC 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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