Malicious PDF — malware analysis report

Static analysis result for SHA-256 478d16788d1a91b4…

MALICIOUS

PDF

92.8 KB Created: 2021-10-04 15:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: f0bb32669f5ac24f150517aa588fc844 SHA-1: 7b034964a96346bde2cb2d6b68a6993fc2c8cb72 SHA-256: 478d16788d1a91b429d56a7fe0a253587acebeacd6585283cb2b207a1dbe3eb4
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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.
  • 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 https://infrive.ru/uplcv?utm_term=can+you+mobile+deposit+a+signed+over+check PDF link annotation
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/ruzekavi.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/jezazikukoxo.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/97122352631.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210924_173245.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/kemun4fq6gauhuarm5d9sllm91/wevunena.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f8a4a7a691cb1f799f8c0f637309684b/10644119375.pdfIn PDF document text
    • http://asja.ua/userfiles/file/sekezikavokuzefunoz.pdfIn PDF document text
    • https://tahsindincer.com/upload/ckfinder/files/dunafibonuvupiduji.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/puwijojewadejepapo.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/vibimojokarirenipixedo.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/82149724662.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/ropatunavefenaf.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/redavamasatafizupuladina.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/kujokugulirorotejure.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/bipefisebaxa.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/surem.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a9bfa661bd---nufegufepojuvegasibuwofu.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/jowomemofunilebujiv.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/zixolujujunukob.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/84989960363.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/42445978282.pdfIn PDF document text
    • http://sfssolution.com/userfiles/file/82310442008.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/36600620971.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/vefogodosotimowafinuvom.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 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_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11608 11504 bytes
SHA-256: 7a3307eff351ee4a9bdb45687a268bff317379811f7afd8dbf27df1b6b735c16
font_02_sfnt_off000130b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B2 19892 bytes
SHA-256: 113835eea56ae775e2dc97b1dcf36ff4b478056f220d8f3ac0c3e614d2ac914f