Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c81418116debc3…

MALICIOUS

PDF

480.5 KB Created: 2022-02-08 05:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 085c6d06c17b3f01cf6e5d04c8199f2a SHA-1: 09458c9d4f48e6e1cfca13dde8a4363de0213cd8 SHA-256: 25c81418116debc30c9fed4284d1e93e4cf44c2334523fe6f74f17277d3aa1fa
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5049

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 http://www.naoconsulting.fr/ckeditor/kcfinder/upload/files/59049011934.pdf In PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/teganava.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///guwufojuri.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/63679103184.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/kovutapikuwirofakef.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/ruzevababitaliru.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/858832dbd0ad749dca2a1b21f7b44dbd/26907326329.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/vobopapulojarimifujok.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/rixisunujopodibonix.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6q4j01tte8gbaifjc8tjpujle4/zogojased.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/57410465396.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/xewidilud.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///45254147906.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/1171828195611f2d33058ca.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20220131064515.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ff390f6ceeb---94827085817.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/37657340060.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/jizoxabovuxijiwadukoder.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/43462491982.pdfIn PDF document text
    • https://webmanagement.markholz.ro/images/file/gabumixugadik.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/14032870419.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/vofipavovarewuzitutele.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/35100866979.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/89741079085.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/bipetotutasawizupixanar.pdfIn PDF document text
    • http://henca.com/files/details/file/zukikikowufeneluleg.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/76248641928.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/9097687334.pdfIn PDF document text
    • https://lovig.co.za/XSRYdR1H?utm_term=good+morning+images++hd+mp4PDF link annotation
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bf814dcd56---53706844016.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_off00071549.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00071549.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00071549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71549 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00072c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C69 10812 bytes
SHA-256: 7029e0d866e4cb7f4bed9ac19b9fab0a3a9e99ea319c0a67fd571af3d80c3c93
font_02_sfnt_off000744ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744ED 17352 bytes
SHA-256: 7c29de3d155444bb7be082b0fa43022f0a669cc878d5d944ace3c626bad2ab2f