Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d92a39c1763361…

MALICIOUS

PDF

67.4 KB Created: 2021-12-08 18:51:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-27
MD5: c40f882626ea3d50dca0084d14c94b2f SHA-1: 7b10a3e3f456aefb50f8383b54f6bd7af27ed9d3 SHA-256: c5d92a39c17633617c7e632454d2a6156a810bb56b20ea933a0350af6ff2bb11
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://saleskerala.com/ckfinder/userfiles/files/95217664167.pdf In PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/817a3e512e95e213032dddc9c937fecd/muxaruvutozadaxezageguxaj.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/legumetonijunu.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/63425f411872001fa2d8ab75a999cc59/28921037257.pdfIn PDF document text
    • http://ibb-online.ru/f/file/93415369804.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/bakiw.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/50566051078.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/dorasabajigibe.pdfIn PDF document text
    • https://gameclub.by/uploads/files/jobufimelimorurutigura.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/gojesuzataguloni.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/rofukipofebupatod.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/fegeg.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/mowigobenajibet.pdfIn PDF document text
    • http://kngsm.in/userfiles/file/gawelumo.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/76723839831.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/97119079649.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16180f4632a7a2---41171023879.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/turifofik.pdfIn PDF document text
    • https://olterus.com/contents/files/gogexoxirujewe.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/moluzuruwezabo.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/32043308151.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/cmwvf4RlXg4/uplcv?utm_term=cebuana+padala+fill+up+formPDF 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_off0000a575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA575 10664 bytes
SHA-256: e331d8fba5d045a6d746edf97e0486b1e95f89194e54db04ffaf0098b2ceb337
font_01_sfnt_off0000bd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8F 17100 bytes
SHA-256: ec1a476113d792c2d6fe7a6c098fc14a335d22bff23138003467a1f53acb5804
font_02_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336

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