Malicious PDF — malware analysis report

Static analysis result for SHA-256 478a90169912df85…

MALICIOUS

PDF

370.4 KB Created: 2021-12-19 05:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: 8806f8f18b07a6f92b8855a7e3b8fce2 SHA-1: fb13ae9205587d2848d5c287aedf4bcfcace27cc SHA-256: 478a90169912df85ecedcd8aa6f2deaf9dcd8e49ab71ac809db3a80719f3993f
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8218

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://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/161b263c281c9d---variladonafuxaf.pdf In PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/rivagakukoxobijakuvu.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/26272014728.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618da7abc06c8---37414232431.pdfIn PDF document text
    • http://innotack.com/userfiles/file/noduxagifubikas.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/nuvif.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/zawikepuzadisomivitupemix.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/lobukigajuxikepup.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/perudisegiji.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/fidobogabupovepozur.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/ripawazutivisatevorozo.pdfIn PDF document text
    • https://askisan.daynexdemo.tk/upload/files/kugamaxesidusezego.pdfIn PDF document text
    • http://ashioke.com/images/library/File/rozunase.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/28890455278.pdfIn PDF document text
    • http://humanconsulting.cz/media/file/xipobak.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/11117910369.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/pivedan.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/dkmjdt6a019kdm5ln9b58ftnm1/dakunebos.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/24690617218.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/000f3cdf6d781bec7e008d9a95120ab7/58788840386.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/30916346147.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/HTGXzuRVGb4/uplcv?utm_term=what+are+newton+3+laws+of+motion+examplesPDF 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_off000554c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554C7 10976 bytes
SHA-256: bb528be3e4c5f6327bbaca1b085034c6edf6c763695d14e3b3b6c396fbee0937
font_01_sfnt_off00056e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E2F 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off000584ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584CE 20360 bytes
SHA-256: e53177dd906cc2c7aa03f006bdde0a12a25bf746d3ac07bd0e930004ebcc6d8b