Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f8cc6143b2d040…

MALICIOUS

PDF

349.0 KB Created: 2022-01-12 12:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: f7bfa9267de21f4ddd440c396a06eb95 SHA-1: b27d28f8706f12c3747804a35a6f5f79246a5c14 SHA-256: a4f8cc6143b2d0405c25536f345b82272c587f678a572046f94f9cdc9b7a6768
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7916

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://eyetracking.pl/userfiles/file/xuvivafikerexodirilol.pdf In PDF document text
    • https://indiansabroad.uk/userfiles/file/75133086822.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/tonulatebe.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/76952061983.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/fivugiwib.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/74382432719.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/31450608535.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/85125967642.pdfIn PDF document text
    • http://nishikizushi.com/js/kcfinder/upload/files/zebeseredegarexerubex.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/bizolulebigiwukix.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16142424fbf8f3---timune.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/v4v9id2g1a80evmuf15tl52o52/fuxutoxujukijanepakav.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/69993492119.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/26203219544.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/30543262808.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/3b070b1500ca47c8533ec4a661287fc9/95206488866.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/taliturozetilerekasizi.pdfIn PDF document text
    • http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/jumezaguvoporerexurowil.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/53694581080.pdfIn PDF document text
    • http://filmovani.eu/img-content/files/wavuruponozogukovulanad.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/50436377831.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/viropoxaxalegamasokapuwox.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16173acdd4cf5a---63174997385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/23D8k0Ec_6w/uplcv?utm_term=blaine+county+sheriff%27+s+office+lspdfrPDF 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_off00050079.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00050079.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50079 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off00051718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51718 19012 bytes
SHA-256: 8dfdc5afb5dceb6ac6d84b3c592038e25c2d69c8824043e03426842c664d014e
font_02_sfnt_off000549b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549B1 11020 bytes
SHA-256: 9bf0b3f46a191b4b7551088601fd8f9d48f1083f7741b491666bcc6a1e640060