Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d810bf652d9bfcb…

MALICIOUS

PDF

72.2 KB Created: 2021-10-06 15:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 1af8a910efbe0311eb84f75af8094c9a SHA-1: 82a0cd991b17785ec03b016986b3598581a2d973 SHA-256: 5d810bf652d9bfcb04e50cf7ddd4f17eba18cb21aa2666249c8de3b3f4328b77
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=sap+solution+manager+training+material+pdf PDF link annotation
    • https://artcorner-fiberglass.com/userfiles/files/gewetalinatobunolowaf.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/161558bce67023---47744357293.pdfIn PDF document text
    • https://chineseclothingonline.com/File/lupelurin.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210927011616_rsc7cj.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/dosoboxalomot.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/35929108271.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/12721938655.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/97363328732.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/orj981ilna1aqqp3uigqd8gj10/kabiv.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///kiwali.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/25550741376.pdfIn PDF document text
    • http://raczcsalad.hu/files/86699345107.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/wogusemiderapavowubevase.pdfIn PDF document text
    • http://101balkon.ru/upload/files/55924655537.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6ca9a1ba6---zumod.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/boziva.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/2650790289.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/34400869905.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/52668407649.pdfIn PDF document text
    • https://safehouseservices.in/fckfiles/file/83638709628.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/84293030909.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/lunubilel.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/liluvujewa.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_off0000b615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB615 11016 bytes
SHA-256: 67236d2af8d7ed9c508a1e000dee2112b0cabbdf3326d7b9c1f872c095ef8bbc
font_01_sfnt_off0000cf70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 16924 bytes
SHA-256: 4137f4291ddf6078311780cdaca0187863af6c242e9faef53454d18aa81c38ad