Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb7743f58081cb9…

MALICIOUS

PDF

80.1 KB Created: 2021-07-16 09:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 901fa328bc8de8bd983a4141b7002352 SHA-1: 5cc3699aacf88c6a3284a6bdd18933374c969d76 SHA-256: 3eb7743f58081cb91ac9e397f67fe6da15fb792bd8fbbddad2933ac9067ade44
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://saxons99.com/clients/5/5f/5faa49e4155ddd0d4faf97b0d7aa3dde/File/35883550829.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cs0ul45t2jtsdecd4rvj835kj5/pavemi.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ucr67buc4f9qocmt678nbgv4l5/12542952181.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210531_163409.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/dojafogonodeliwifanema.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/079ea2686d94bc9f84050734833018f6/61736449028.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2f55e66bf---73697763564.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/78342130692.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10708a5f18---7016715271.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/94810274300.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4da18102e3---2704997099.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/44b7mu6vu27edj55j0fjqgkt1c/kagaluvegebekalijorakatiz.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/18010382754.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9f6e35d37---83929721749.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/seduwipefuz.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/81b8f84b47b71519f1a8128cfdd26fe0/rabazifepuse.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/dalesepowuzozat.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/migidiwovakelakifitixaf.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f0f836a2---feluridud.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/26154446402.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/lisawaxize.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/wifojojaxumopa.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/losomujalir.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/8918683879.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/72599529140.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6fdcc1247976895dd4e6a756015c69bc/87654787895.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29dec2036---64939978033.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=introduction+to+naval+architecture+gillmer+pdfPDF 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_off0000d5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 16724 bytes
SHA-256: b27c0f0e0750918e570558d4ac4c9428c988782f3ec0c54e746a3884e2d85f1d
font_01_sfnt_off00010137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10137 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 11016 bytes
SHA-256: 2044637c7f4b80ecb927c85ba0b79368daa43797a6b11678c4d7c49303728e2f

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