Malicious PDF — malware analysis report

Static analysis result for SHA-256 830dc2da06806e08…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 23:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6b97be3c8a0569737d2bf12a9bfe9c4f SHA-1: ca8f536e133277da245665f7d33980d566dccff2 SHA-256: 830dc2da06806e0833776a15ac2131b5511a06c0fd7c7c40036f5af987a45576
204 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple external links, some pointing to compromised WordPress sites. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content likely prompts the user to install a browser extension or update, a common tactic for malware delivery or credential harvesting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of further malicious code via the embedded JavaScript or linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://niszczeniewaw.pl/userfiles/file/zusakudazurem.pdf In PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/vazupemoxup.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/71052142856.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/43be0ad3c180172391446c9bf053146c/59335909779.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/dowisoxus.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16091b5db3dc5c---61283410572.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/dbdca364d12c607a7055fb96099135de/dametigobunezopagode.pdfIn PDF document text
    • https://puppometalli.eu/file/26210225118.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/kuvejemisi.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c734d6b776---22647904054.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/70450200509.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/ti1vpt7ka6eav8c139tlgqc0t4/26718277551.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/lql871r2fl6v5v3at6qoh6fqj0/gopiliditanuda.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f7ce5596d---82856375178.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e422a82095---57790493687.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/af0a2087dc7667a6bc16565ad29b6f49/paboxebunemorememuputon.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/79985567575.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089198d8cb18---vemegobavolaferaduxovito.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/6eca75c1513164fe3f7abebb104cb065/salexikizuzati.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/ripof.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/lipagegudijutu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700bbce79cd---fomewexigo.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/12945807496.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609568b93e111---muwowodutizezumupabiluwu.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/sawuwereleba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=learn+german+with+stories+pdf+free+downloadPDF 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_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 17888 bytes
SHA-256: 13ad2628df52a741358740bcbe7ac54dac25fb20fc303288ac5bdf5383a8a93d
font_01_sfnt_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 10988 bytes
SHA-256: af359b08049d95a3b09f69add724896edb559f5821d145a63a09a5c151b43d40
font_02_sfnt_off000132e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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