Malicious PDF — malware analysis report

Static analysis result for SHA-256 6838427cae67147c…

MALICIOUS

PDF

94.0 KB Created: 2021-07-15 19:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7094192496c1f8b2a3d9fc7d34ccecae SHA-1: 0cbe6201f6d8a75c987e60bdd4021ed0e1b173e3 SHA-256: 6838427cae67147c5e5063455beb595c65845e208f637fecc9c5fa4cfbc95c9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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 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://smidgel.ru/uplcv?utm_term=the+truth+of+all+things PDF link annotation
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/aa0170b3e9c8063243fdaffff551ea87/13060030720.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/lagelfvepb51uimi66pbs08sb0/84754211532.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee513e2a2e1---39750126514.pdfIn PDF document text
    • https://mihalex.by/files/files/labuwapekuxudumoruzud.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/dawovagawoxap.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/cbc0691f2edc028c2faca0c3ceb41f4d/tadomazadevubojulosilu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf10f7a354---nasulimimolikomag.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50e12aaf8---83040055708.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16079f6c4bae6d---nipotazadu.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/tuxazonure.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/g1m5eum9sdml7pvgdhf20dru3m/worevudonozepafere.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/e80c6f103fe93626a165bfa497ec3b19/85473266317.pdfIn PDF document text
    • http://ibb-online.ru/f/file/tuwuzi.pdfIn PDF document text
    • https://andrejc.si/files/file/5377809388.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b4e3c70a785ea29f08de711457a64b0c/xisudokaroxudofevoraza.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076674c03ecb---jimivesizojobugowejo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d15512fe426f4c8bc5d1f943d9c90b24/goxijukezewif.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/t9a3pbhect2qf97p8p45lth1na/rawowapoxuwajijodo.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c9ec4fd88---gikinefudisurupizixoj.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160814f2f81947---lalerupadusivanegeduw.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/844946143.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9b7458a77---93590685190.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a18c5ca33d---87580795026.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f80f2a7ce---pajeponiwulofatu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a61c06254f---dogugamut.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/domevorigaxevol.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_off00010b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1F 17744 bytes
SHA-256: 342a8fb88ab96a46c028ff7bece2d81a525c7ec1a64e90008eda3c8cefef053a
font_01_sfnt_off00013905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13905 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001511c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1511C 10556 bytes
SHA-256: e8bdf30e885b21b59bb631882f29e225975d6f0712dcaf47d8d39579d2d4141f

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