Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3ed70c3a64aab1…

MALICIOUS

PDF

107.3 KB Created: 2021-10-24 03:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: c8a3315dd856e5b9835e3e4120292b86 SHA-1: bce522a6909d0224d399d8abc97fa8e70ba5ab8e SHA-256: 4e3ed70c3a64aab1e1596e9ec5e9e541fb601f60ef4a35305c415d20961bd9dd
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://krakow4you.pl/krakow/files/34538572161.pdf In PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/porirevisireza.pdfIn PDF document text
    • http://idevoz.rs/files/83670639494.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/e418eg9n2d19v2ajo3bj6if408/zojerimofuvugakezisulegaf.pdfIn PDF document text
    • https://susta.vn/userfiles/file/wixefopejezekebib.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/8acee5275b78340122bd0d3de94529b7/duluzaja.pdfIn PDF document text
    • https://congchungnguyenlieu.vnpec.xyz/uploads/files/51482849873.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/fipuxukudumisotopas.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/kesipin.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16143a1c8623f4---96586063566.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/49249767358.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/tinof.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/30475237764.pdfIn PDF document text
    • https://petala.gr/userfiles/file/1921496033.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/sibevisolobadulizer.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/dewofaton.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/13703315869.pdfIn PDF document text
    • http://enricobarraco.com/files/sogusasibowawujumoz.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615eef032e515---kogij.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/82394879225.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/7307843751.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/99326985024.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/lofipubukijiwa.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/75713531561.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/c1c75c836956e85df4bbed1649e260c5/64145469846.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/bojalabebeduwepifezad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/KGDyd8lM0uI/uplcv?utm_term=5+signs+of+anaphylaxisPDF 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 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_off000133c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD5 23072 bytes
SHA-256: 5a3a70969499bc0715ba48df824ce7b01b449e8b5573be43e44f613ebcf40755
font_02_sfnt_off00018743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18743 10560 bytes
SHA-256: b44282a72c9c9905c2488a12cbe5ca7e989c09b04b3224e9ceeda02bddcd0957