Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d1e958aee7b65c…

MALICIOUS

PDF

81.3 KB Created: 2021-09-12 00:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 8987b99cf7dd8396a518d4c1dd97496d SHA-1: 1223fbbdca0d6e24cf7ca4ddc6b1a9c1182397d6 SHA-256: c5d1e958aee7b65c9c1ee70e7bc476c5a09961cae04a186838244e33358aa57f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://precisao.org/files/files/zisuzowivifuguk.pdf In PDF document text
    • https://mahae.hu/files/files/6149846783.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/7964337567.pdfIn PDF document text
    • https://buyafranchise.org/files/files/fakalegogiv.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/fepakawokozajakisipub.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe68a70e81---sagasazewud.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161384ea3dfe8b---24543032479.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/90968341229.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/rudalesujiro.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/nodebesel.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210902195620_t70zea.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/38553890412.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/dadunapusi.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/kogaz.pdfIn PDF document text
    • http://hidropro.hu/upload/lakavixuxosobubuvowarasi.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fecea30d2c---jubelaguwalikupevasasopo.pdfIn PDF document text
    • https://birudongker.com/contents/files/37357818355.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wedeziwagiteloxolava.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/32002294155.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/93515425627.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/zusowuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=assassin%27s+creed+identity+apk+free+download+for+androidPDF 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 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_off0000d652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD652 10920 bytes
SHA-256: c77847d17b9fe84974527805172526397c08fb56207c0a05d4fb9cdb0b36ecc9
font_01_sfnt_off0000efe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F6 18088 bytes
SHA-256: 0178c8dab4bc244ebdf3ab6c4018335938ee298b949e825995350826e124a234

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