Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ce28763a4e7ed1…

MALICIOUS

PDF

508.2 KB Created: 2022-02-01 08:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-27
MD5: 88ff366fb6fe1e767ad6a1153e5e3e3e SHA-1: d8ea357211781cc0978dcdbe229b3b817e680a5f SHA-256: a9ce28763a4e7ed153000ea28c2451e6fd6952033670ef69c49fe50b83df5d77
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5877

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 https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/42qq0o5e31bg5bd0n9ib3n37mb/xadomulinuregaxe.pdf In PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/83c11b7b1c6a9b240954f4d24b56ca17/84816867926.pdfIn PDF document text
    • http://nrtz.fundacja-spektra.pl/upload/files/28189335586.pdfIn PDF document text
    • https://1111skorpio.centrumnet.hu/UserFiles/www.1111skorpio.centrumnet.hu/File/56014721714.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156166fc42e7---zarapesatefu.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/62102176264.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161d0857766af0---70746565126.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/daxoditepub.pdfIn PDF document text
    • http://videlec.be/ressource/file/webuwizinajekejofi.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/tupenatulozubu.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161a1b37e2e426---56834563639.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a8489613df4---gawibawejoxobosifujanag.pdfIn PDF document text
    • https://cafij.co.za/XSRYdR1H?utm_term=esprit+bed+sheets+online+indiaPDF 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_off000782e3.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000782e3.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000782e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782E3 10612 bytes
SHA-256: 099e6ef7f8517d702020777b205a12a4af2e1935b006e7324c7750be0be5fc01
font_01_sfnt_off00079acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79ACB 18032 bytes
SHA-256: 1f70292166cf5c2ef895652a523f516709240c0bdd2af53c53543e40b46338ec
font_02_sfnt_off0007ca9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA9D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336