Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3e0b534961de58…

MALICIOUS

PDF

85.3 KB Created: 2021-06-26 04:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 09a31def30caf4b8f4a337f57213f46c SHA-1: 8b68034443f6ddff3b0eed124bf522d798275604 SHA-256: 9c3e0b534961de58f76f87b8d28bfa27418d7974c4778e7a08dd0cc1a80a7f70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of external URIs and link farms strongly supports a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=adventure+of+the+three+students PDF link annotation
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/28416cf2bffaf8a6f1cbe74bb890168d/39016484045.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/ligukoxujosepak.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9f8f8207e51213f89f5940cf7f02129d/jososonixafaluxivanulid.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/9mdnv5lmt928ht6c2u6jkgq51p/zunemagirekes.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3c1ed5a3---86827281660.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ki8iv3snsg4vgorefhhqakva4o/pozemisanevidivafo.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2ebb8b698cc6d78efb71bf251f39e19f/binikupo.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/dc071a3d3499b50b36916abd7f881d40/64252980734.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/zizifidawasoxabafuxu.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c93edd81209---50007935834.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/56668881836.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/sujiwarizuriduxira.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/todaniluxuxejirumotes.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/safizaxadowenolodadaw.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16080f93a9a448---vorikazuwadopowavifebod.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/62330324493.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4c45f16fbcdcc3fc8a377b15261fbf2d/88365646074.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/to4l96quoab9q4fauha802627l/wuposuzoxufu.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b86d741c47e---30826108565.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/24113332449.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/folibekugoxikinuresejan.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/56491852647.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/5ddd546a125dfee39da408747340b209/rejejikenopi.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/vitewetibonokejudob.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/99281178534.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_off0000edd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 16528 bytes
SHA-256: b306f085e589ff4e1e6c22a5a3b19b3649f91b15ad61588f7f027ab06894c50f
font_02_sfnt_off000130d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D4 10300 bytes
SHA-256: c72fca6578277d070e536fa1dad991b7a92e7bed8207b03a53a8fd23889b40f1