Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c88c15e3cb7d36…

MALICIOUS

PDF

375.9 KB Created: 2021-12-28 19:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: e144fbd365768d381a5fbd91e614cf64 SHA-1: 940e993f3b6b34b38e1b80508c11ecced18f40aa SHA-256: 25c88c15e3cb7d369f90938a4944a77f144280b81570ecda01127c7dd36f149d
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6606

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://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161c2ffb7c3ea3---vedejagevuvobima.pdf In PDF document text
    • http://medica-eg.com/userfiles/file/lofuzosixuxovimo.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/loditurufupurisukasejub.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/58abc4acfa5b2e99984175dafb5ecf02/birudusiwi.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/16470366849.pdfIn PDF document text
    • https://porfic.com/fotos/file/vafotol.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/65823016702.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021111503571573499.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/pazinemogutiriv.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/zifimewupuvove.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161b8b89ff3c57---novutamuwivowogivaxisikeb.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/94842733296.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/94bf36289a34c2029801f370eae1b9e6/63339495815.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/radakavedipod.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1633554661.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/zidezipitalo.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/95988486033.pdfIn PDF document text
    • http://atek-ent.com/upload/file/kogotitimon.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/zumafi.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/75392689756.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/32555820245.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/tifugexavanaduvusawigavig.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/mugowitokepajawejobo.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/1919182221.pdfIn PDF document text
    • https://cructi.ru/uplcv?utm_term=icd+10+pcs+guidelines+2020+pdfPDF 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_off000571b9.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000571b9.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000571b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571B9 18472 bytes
SHA-256: 9f5f3e39c3ce83f1541ff0936171d2e54793deb214da5502fe3acd35bad614e5
font_01_sfnt_off0005a156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A156 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0005b7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7FA 10660 bytes
SHA-256: fa7da0c8131f2a9c080281dea4bf88f9138dfd4087656b17c81db281b924a183