Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ad73c0fb9150df…

MALICIOUS

PDF

89.9 KB Created: 2021-06-28 11:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8957229e5f41e0263a990b6469d41b55 SHA-1: e43b35e38046ea1af04156c59c858195ed0899f2 SHA-256: 59ad73c0fb9150df8c0d1dca630f4c8730bda472b38b154f11d918ef19f12e1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://coretry.ru/uplcv?utm_term=daily+coin+master+spins PDF link annotation
    • https://alice-immo.com/userfiles/file/dekumekude.pdfIn PDF document text
    • http://lblussana.it/images/file/92939940964.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0cf3192a7---51447157820.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/f2lqkcesr576n23uqj0odudcn3/77258853447.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/72584559343.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/24666760916.pdfIn PDF document text
    • https://argumentua.com/i/file/5867784776.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f3c98da4---dexebujewonigarames.pdfIn PDF document text
    • https://noddy.nu/images/file/24672879.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/53922598714.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/88359173367.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d805dbd49---73596371785.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744a8237d48---6764283495.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/silef.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/9vf68jqgve50uo1daaldn0da4hl0cphe/71534831550.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/9810672995.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/80862126379.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b5afcad085a55beb9688690541699527/refaramotakixonimamami.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09de03a65---46522878452.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc4b400b8f02867444b758543d01b56d/tuxakine.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/965dc8e4mac6sls0s161dgq7gv/sutomidejelufowasog.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/33035567797.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/dm6695boiirhonbv2543brucim/86552172753.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_off0000fceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 16748 bytes
SHA-256: 161e496f2540800475d4b6167dbd3c9ac8fe6259465fc45fff3a63bdc7565c3c
font_01_sfnt_off00012875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12875 10652 bytes
SHA-256: 2c75240e6152ed8b96d7428605bfd8a4cdbd13fce186e7a9c203c7e4de3da029
font_02_sfnt_off000140de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1