Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb86ab8275e28e6…

MALICIOUS

PDF

96.8 KB Created: 2021-06-28 01:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 27e65175fb48f2b9f0d0ab2a4dc44038 SHA-1: c133417382410578b47faf800bc260cb9e968ba1 SHA-256: 5fb86ab8275e28e66be9ec541e4421f315cf3d3bf90c082294ab0f34fe018d0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be redirecting users to malicious content, leveraging a technique consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://daaeportrett.no/upload/file/tujafoxix.pdf In PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/saxotubusinatajize.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/81209247939.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/03094136940c3e154c8c7a206675182f/5998568378.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f48c377613---93674769744.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084fbf281143---20237981231.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949c0e6beb9---junadufokad.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/97562656909.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/rizozekobinofosajetaz.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce819e6d5a7---rowasatutepofonimaw.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/80355940745.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/43jo4sq82cbbf7q0kot69dfnbj/85463325996.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/dfd91ce367fd47a313e36159312b43ed/1714774182.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/56d47fdff7c8c8fe5cbe90c75311bc33/12884038852.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f849f1520---50049456713.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/waxagukiv.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a661a7bf1e1---jupofagejom.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/korebovapivevopizalurero.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/masorir.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/xekiwepajaxemuwadopabavum.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7d34461bc841a19396fdefee4c6f56bf/morudupasegavasaruxixedep.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/b127e2b289a5a093885e03350c67204b/vebexapex.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/ucicrohr05anvuirhiobl0b6pd/tagubepuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=meaning+of+hallelujah+in+the+biblePDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7D 18260 bytes
SHA-256: 149fc5da2f8436cf2ab06dcabb846a879717234e3e870410653a3cca1d5dbd6e
font_02_sfnt_off00012af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF8 19236 bytes
SHA-256: 2e7ab11fa0364a976af4bb65c2ffbc96628a5fe97473f77838c338ef70f71ac5
font_03_sfnt_off00015d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D20 10588 bytes
SHA-256: fcd49019d670e642e442282887b6761b41760c97c53cd974642e609689663eed

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