Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac3fd9d01f10add…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 19:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: efaa284706b568130b2c99266545b3a0 SHA-1: 8a14abc7e652ae007680641ae7fb85258b90e530 SHA-256: 6ac3fd9d01f10addbbe610808db8794650c7414026941399695564c207587742
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=desperate+housewives+cast PDF link annotation
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094bfc6ce0bb---36376667087.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/31113060643.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/7815954dd6abbfd24314fd4e65cd2afc/kiwidoziweriwubidi.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/53605610655.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///66346613609.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4abf00d19---mawiwuletapak.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/xofusozoboxemo.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/75537442021.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/felegexiv.pdfIn PDF document text
    • https://topupdana.com/contents//files/kavibusinitalorotematuv.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/784c99f4dcef3ea29c3cbc802a2f4885/wodese.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b187f53bcad---wivekerax.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a79ce0a3cac---juvefuvajisaditoniwir.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/uanskgtfqfvbah4l04hjap6hd3/fubipaf.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a090c8d582e---nuxijurokunevi.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/56393248288.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/12477378435.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f9f2b8545308d7cf707393e5d5e191e/tirorafiwapobejid.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/narazox.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/93793042108.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/21294879090.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081196860b16---suzipipola.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/fozitipakisub.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/savegelebabudo.pdfIn PDF document text
    • http://metrokentakifinan.com/resimler/files/2891422380.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_off0000f76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76D 10576 bytes
SHA-256: 3c34561e63b66e7b12ce036c9c7dcdc07f214ed419716701535a47eb4b1c540f
font_01_sfnt_off00010fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 16496 bytes
SHA-256: 4b104bfa175e14d14a8394fa74c072c34fc3fa660a228a4df3bbb678183d4a7f
font_02_sfnt_off00013a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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