Malicious PDF — malware analysis report

Static analysis result for SHA-256 425531d83858bb62…

MALICIOUS

PDF

76.5 KB Created: 2021-09-12 13:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 412817392bffdeaa104c04b2532f923c SHA-1: f6fbc6cc13788011019253e7cf6ffa3afc8ba31d SHA-256: 425531d83858bb62f46cdb2a214f9ea4972655d72417752c246035e87e25bf86
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://zd-zeta.com/uploads/files/202109092128553003.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613081845a430---25592419366.pdfIn PDF document text
    • http://skmsm.com/userData/board/file/zukawajatebason.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/61520519790.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/48928790122.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/welomoxoketujitirawe.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/34149897533.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/29727165055.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/79716320007.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/gepoluneded.pdfIn PDF document text
    • https://lordoptika.hu/files/files/fakebowudafoduxe.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/kiriboninisimalizada.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/54243618458.pdfIn PDF document text
    • https://strategie-forex.com/ckfinder/userfiles/files/wozeru.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/mejaperarizusi.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/4263395092.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/wenesuwiduxatumisatevolet.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/12539984882.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390808abe45---11342514991.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7f5ee8d56---77945951828.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/11112680048.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/rokemozizoku.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/nipamif.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/nijomofedobuzexudukeja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=apk+movie+apps+2020PDF 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_off0000c6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E6 10448 bytes
SHA-256: fa69e2b6b5df4acdfaf2aff14426477f0cd1a7000ac4bf34803723ddd2c33163
font_01_sfnt_off0000deb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB6 17736 bytes
SHA-256: 166eccbc1de1b0148b79c6b6783d9d6f439f34a4373da89b44d5b8d2e1af3f8a
font_02_sfnt_off00010cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1