Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc71d4eb1387c30…

MALICIOUS

PDF

89.0 KB Created: 2021-08-21 04:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 14ab2f2fd25e345342a39666fe3921b6 SHA-1: 32d0222854494d0b2025524886ff97e032a806c0 SHA-256: 1dc71d4eb1387c30c9827ddf8e396e064b4b996c887f8890b7547b8d3b87a52a
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=abstract+noun+examples+in+sentences+pdf PDF link annotation
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c71c701be---majoxamopomugakipalu.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b881f187c31---laweguliponuxuvolomogamo.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/89526008751.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/9969532417.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/b7b51aac57d689e7dd0aa267008a7c61/90044786593.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/414ac8230448915126018d9922e04084/75572477682.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/1t0njcc5fri586p5be8v66gvu4/muxiwolebebowowodok.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/51095934374.pdfIn PDF document text
    • https://vleek.com/uploads/files/selujarowarugiwatel.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/783180cc7b80a3bbf8306b01251fb853/29681156974.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/79034959459.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/33255934794.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/79967174489.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/7a5716ea9e231eb56b6479d36db6e069/20115050271.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/najaxomoziwub.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/0f021c5d509f3e3950ffdd58ebbedab5/lugedunek.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/umgen0h98l2av8vtfibki5qqu2/pefewumu.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/lemedazofofumiwofunonudev.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/263475350.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/19344861732.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9edb32196b---93469546104.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086726a1f371---58523098639.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d62bbbd642---3840035084.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88826a644d---zopulomidiz.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160918daa96713---16292812845.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef2352067c---84472171876.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/95218836863.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 11104 bytes
SHA-256: 888a69ec8f9962b50f7a973482c43cc5e572025c9c2775eff18465f7882b9823
font_01_sfnt_off00010f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7C 17316 bytes
SHA-256: 257f8be2fe7d6d9025c1033cc5a44e92266afc872faab1c8ec5eab4d5fb68d50
font_02_sfnt_off00013ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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