Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef7b7954cbc9333…

MALICIOUS

PDF

72.6 KB Created: 2021-06-27 16:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 84b494535af16b1641ce412b1bb690d4 SHA-1: 5ec033e156ccf0f0d80bda74c51c9f3134097c83 SHA-256: 4ef7b7954cbc933385f5c200009e4f931acde9e7da274733980135c0cf86810a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. 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, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://www.bufolari.com/public/immagini/file/86562112190.pdf In PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/poximuxixik.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/rifaw.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b076e7ab9---46225733464.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ltusdaaop50vugo32f1bvf9hl6/visoruf.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/cerp8ihbn932v23o0ae82u7p6c/tofojawu.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a2c728c8a91d59ffdd4b313f6484e4fa/kemewuxitiwapop.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/269bb95d576c919acb6b06c3e654a382/68724183246.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/70750893417.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160989ee057af9---kizumujujabasovako.pdfIn PDF document text
    • http://limoride.net/gallery/file/34627356372.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb07921e4---88747663674.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d5cbf1d2---gapepofigawejewanatopul.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/gimademamuzowanevenati.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745903ec799---43850265667.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/h3l64c1cv3sk8lk537p39h0vj7/fatipomixurex.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b180fba23a8---wavebikobesos.pdfIn PDF document text
    • https://atrax.hr/files/vosewinetijopevodefax.pdfIn PDF document text
    • http://jonmechina.com/ckupload/files/nowizuxebemorozubixal.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3271099750d4bfa81fc2b67be5596048/74169617660.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/sogiw.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/25753434323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ribosomes+are+located+in+thePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6F 10820 bytes
SHA-256: 23ea77bd6740efda331c6d665f487240c538c54940e2da0b2a5588cbd92daf83
font_01_sfnt_off0000d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD525 15724 bytes
SHA-256: f8103b6855f2affbba0a2a8384ad26b5792950eb191af623257012de96d61026
font_02_sfnt_off0000fd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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