Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f8a683f9ffe502…

MALICIOUS

PDF

216.5 KB Created: 2022-01-05 00:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: f9efb6b6aba89c244ecd759ee19c4706 SHA-1: 366d856d7e2feb2ba80068a55669a9436781fd43 SHA-256: a4f8a683f9ffe502ec3180caf8c3151dddc2be0c3980d128819f3a3c1d8d3b95
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9540

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16198a3b49877a---sefitezokuru.pdf In PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/buxuf.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/64484211636.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/19636896237.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/99204323434.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/7292977908.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/begidipap.pdfIn PDF document text
    • https://apagar.cinemadossertoes.com/ckfinder/files/59506802930.pdfIn PDF document text
    • https://maisonfamillesrimouski.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/vevomovujagorulutojikoz.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/lixebimimawife.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/3646531474.pdfIn PDF document text
    • https://geekers.tw/upload/file_folder/file/79122322149.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/43808526145.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/vukugulujojeg.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/tugilotitekamevobi.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/71047880825.pdfIn PDF document text
    • https://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/maratukodubinu.pdfIn PDF document text
    • https://mots.alaxarxa.cat/cmsimple/images/file/povipifutudimenanowatugo.pdfIn PDF document text
    • http://tvps1.juicy-group.com/editor_upload_image/file/87809567268.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/xereroxaxolusid.pdfIn PDF document text
    • https://www.varoslod.hu/kcfinder/upload/files/15941483280.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/29873383752.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/29080108235.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/doremadivipux.pdfIn PDF document text
    • http://asfalon.com/__files/file/lapotetiwug.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/tgwjJlsMqHc/uplcv?utm_term=bulleya+sultan+movie+audio+songsPDF 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_off0002f6a7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0002f6a7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A7 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off00030d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D46 17020 bytes
SHA-256: d20d475d616e206c79243b827f063cf3775c3be5d4722ccb2b1ab5cfd35b2470
font_02_sfnt_off00033971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33971 10824 bytes
SHA-256: af4f44ad505bf8afa50fc59513eca5ecce7bd7cb74c3229444e69f1707cf1dd8