Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f22bfb45d52855…

MALICIOUS

PDF

118.4 KB Created: 2021-06-26 04:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ec4a89ddf0bb94e247696dfe2beccf45 SHA-1: 0fdc574f9312dc10d31063720f773d86ac0627b4 SHA-256: 82f22bfb45d5285545ec7fc9b83a0c47d0cf717666ebf1b473d94b6bbd2cabda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://ketchas.ru/uplcv?utm_term=sims+1+no+cd+patch PDF link annotation
    • https://planet-for-events.de/userfiles/file/setofebitivekoworex.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/vqppjso7ici8l9fm5tql1hfgrq/27244837218.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/1fe6e01d83464a0743cc968f30db420c/zowono.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e4f0543b2---vakatosubaxilikuvi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/6e159b753de9699a9775cc1c51515988/51670285732.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/d8a5e3c0b14ca4ed7db6e8fa8067cbf7/tiwar.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/bilaxitoxe.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/kudugosanom.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/c1995be541bed79f8bb13880530ca02a/11627837310.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/c39e6b820370360fc3abe475c09536a7/13212120522.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d078a8423---logovitewolirikusotani.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5e4024c9f---leribanutadovadobugifu.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/023ddb60c745c035e13b29318dd21b22/posimonodeziwapini.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9eb2f505---75836472610.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0e720af32---34037122088.pdfIn PDF document text
    • https://arerp.kr/data/file///9003182682.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89a33472b1---varepilezarulidol.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/t06lmsgmqgr88erqn5tpbujvge/34390172191.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/27652064323.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/nexonisubumesik.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072435895d7e---3340179753.pdfIn PDF document text
    • http://sivam.pl/files/file/witisu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/afd71b55cada7e083ccf94754b2071f4/xazebozunudiro.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b149555e803---48184034923.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/59651887842.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_off00016b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B0B 18232 bytes
SHA-256: 0ebdd3fb0efa2626f06b4d00aaeefa9998b2455d37e777a4be34c4967441a185
font_01_sfnt_off00019af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AF2 10628 bytes
SHA-256: 3d79554ce56d45d04e055904b2760ccec9e013133c1f1d120ba8878ee68efc83
font_02_sfnt_off0001b312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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