Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db43e981bb17cad…

MALICIOUS

PDF

96.1 KB Created: 2021-06-25 21:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e4dd71740a0bcbbd77e7236deec971ae SHA-1: 9a720ba61e7adf16162605d448f5817ebfaeb080 SHA-256: 3db43e981bb17cad871dfe7a2ea0981ed7b9a5edda3f29e38d123cdc5cc58a89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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=my+cat+wakes+me+up+at+night PDF link annotation
    • http://sacoorhealth.pt/site/upload/file/45831148317.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3d65a06fa565819e5140f9672004b257/wukizifafozunineni.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608042f7dd1c8---49889805842.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ck3aloo2s5iuf0otofop6etvv0/11606719748.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ddfd0qd06tdblo7kml5oita5k1/20392392794.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/roviwobovejipidasoxivu.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/nogopogabawowusaputegakox.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/resovusetoloziguxo.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160819eb471c36---fovumuv.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/27987208722.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/todebowajevatifaw.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ca895a5c71d---89213988542.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/nuxas.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/cdeb34f47565c8e529659f3e0a3d0da3/74523238971.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/rozugufatovulawekowipidu.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/naxakag.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/72814411017.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47755b58cf---85013553670.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c7269260a---nolupalirunosifufifomu.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa799257f31---vokijebosimadek.pdfIn PDF document text
    • https://chptravel.ir/data/file/lobodowixuxogafagenadap.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8534479b5---kanifusafuniludiwi.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7ec51aa0e---77362875181.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a44c6936786---13629393740.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_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 17708 bytes
SHA-256: e13f58c2abb6535f07fbc5f559368e6c34284dfacf02924e4f0afc36dd12bd3e
font_01_sfnt_off00014089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14089 10940 bytes
SHA-256: e5459083b7b0ab2999501752dba7dee78fa1a31b2eaf96b9128f5ee6778b0863
font_02_sfnt_off000159d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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