Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d31cf25b0d8d8a2…

MALICIOUS

PDF

86.2 KB Created: 2022-03-31 10:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-16
MD5: ecd4ac0568ea6d3d68283422aa4bae35 SHA-1: 205cbaf41135040fd138260ac8ab741e8e7b4454 SHA-256: 5d31cf25b0d8d8a28a181caaaa3cae6bac7d11432e10e49fbe86ac7979dfb4ca
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://savalis.ru/userfiles/file/bupijuwazidosome.pdf In PDF document text
    • http://smenergy.kr/uploaded/file/1200339045623497f9300bc.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/35992255192.pdfIn PDF document text
    • https://onecre.com/images/content/files/82561001904.pdfIn PDF document text
    • https://87tunghia.com/upload/file/ruxukeranojesa.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/43330665185.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/lukepukebapadopomugop.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/zerigepazeg.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16226d483629df---jovaji.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/jotawenesed.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20220303051515.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/3510114042.pdfIn PDF document text
    • http://lingotranssgg.lingotrans.com/fck/file/58536724978.pdfIn PDF document text
    • https://pacificengineering.co/imagenes_cont/sitio/documentos/84996391343.pdfIn PDF document text
    • https://www.ttmagazin.com/assets/admin/js/plugins/kcfinder/upload/files/58147525821.pdfIn PDF document text
    • http://tsetv.kz/app/webroot/js/kcfinder/upload/files/keribawupezuzeluweserize.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/zupudipowa.pdfIn PDF document text
    • https://przedszkolenisko.pl/userfiles/file/fejuza.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/jirematiwemujoforojerukud.pdfIn PDF document text
    • https://orangevelodrometrail.fr/img/uploads/files/8411031845.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/8339101625.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1644364771.pdfIn PDF document text
    • https://russiandance.ru/frontend/web/js/kcfinder/upload/files/12804583673.pdfIn PDF document text
    • http://securite.paqt.fr/images/file/vefezavusovade.pdfIn PDF document text
    • https://lazav.co.za/YmrXLWy8?keyword=how%20many%20oil%20pipelines%20have%20leaked%20in%20the%20usPDF link annotation
    • http://terredellamagnagrecia.com/userfiles/files/bebopomuwazeba.pdfIn PDF document text
    • 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_off0000ecda.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ecda.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 11008 bytes
SHA-256: 1702ad7a40b36a7cc7b948924601934fb2a23e00162716988f814078fa0dee8a
font_01_sfnt_off00010648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10648 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00011ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE7 17488 bytes
SHA-256: 04b51136917eefcfb5b5640f82e9ad6c7c1fee482355d6e2a56b3f5c35880bef