Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc54377dd004f87…

MALICIOUS

PDF

76.5 KB Created: 2021-08-10 17:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 57baa3cd7c0ce60a2324d8bc287a6293 SHA-1: 14592a490250e4ecba1b35bd22946ff83e9656b5 SHA-256: 1dc54377dd004f87968681ea91abc81a61595391de1532ed18589bbac7dbec9f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://krisoc.ru/uplcv?utm_term=cvc+word+family+worksheets+pdf PDF link annotation
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sja76bllivg065p97ovisol07v/vonunikili.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/33097463225.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/99792631967.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/3a21d0d1e51478945d7c9b8017a710d5/zopijaguson.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/fenomiv.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/8da9a147849b6bce3133ae61c056642d/32796830039.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/subozulu.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/69536461983.pdfIn PDF document text
    • http://kbchina.de/upload/1216660122.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/66113270031.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/91902775887.pdfIn PDF document text
    • http://altinay-law.com/images/file/33814608616.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43780163879.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/34p0alcipb58dar7vcv2tsmkh0/6656136212.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/9422601182.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/a3b50662b745483b324b84dc35246f91/piwilewusiruximi.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/15326086270.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/0ous6q2tlfp7mlh4dfuqb64fa6/81236679953.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/betiz.pdfIn PDF document text
    • https://facade-metal.ch/ckfinder/userfiles/files/rarapijame.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/95248837821.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/62021295313.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/bosasisobaz.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/iebpmnmoc2p4amnphf65de74h0/98593118018.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/14589999026.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_off0000c6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BC 11168 bytes
SHA-256: 3a9c43d3493159855152d9a96252cef77f64213b36ea5716dc289585d94e006c
font_01_sfnt_off0000e0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 16256 bytes
SHA-256: 80ee91d2fffd4bbbb52a20d37569e581bc28b19b7f4af96d97accfe2915412de