Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59881f03a74c75b…

MALICIOUS

PDF

86.5 KB Created: 2021-06-25 23:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 17330afe4fc629dc35179f487596634c SHA-1: 4f7de1ffa5c13dfb77a556c3bf129fbfb5fe5766 SHA-256: b59881f03a74c75b22ba60b3c247ea65f7f51791eb2790148f2e4755b48ed0b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF 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 ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://circolodelpistone.ch/userfiles/file/6499479380.pdf In PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b2ff413e2---pizupazadev.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7a1ab025ec3ed3a69ec06eadf7a7ff9d/67240809734.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/zejosiginufexopuze.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/95e50e5afd2d5443b28ea8d6c94f2d84/gemijajenajegesob.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab4de4dcc0---17364324003.pdfIn PDF document text
    • http://ahs1966.net/clients/f/f9/f93f52488d971b5f2372adc2bdb16541/File/32198829852.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/boluk.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984d74a759e---gexiw.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rd7vt9m8qp65a4kem7dnl6qds4/10084816699.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/mkgp2h2qj6o3268eptelb8e367/rapuxomipijan.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/99142679150.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a08e513385---dupazigu.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c6691b8ce0d---34578501615.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/88055297760.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/kafel.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/53590786584.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/bjl0ahuehu362uuvsjiene5u87/8302801172.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/04e4ca2277106f03f00cd0cec13a71a0/revaxomojiwegu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ee6f3a7ed9947b698374904dd9d9cb9a/piweremivariwapamoz.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a66049e09a4---15004037075.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/43975237367.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787d943b26d---terasizosijanesab.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/11851ce19e496f8501a57a9564be56f9/47502544979.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4fba2e83a---wegikibikugewezelalim.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f41e6de87---zosuve.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-18/20210618122452823075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=light+browser+for+windowsPDF 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_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 10608 bytes
SHA-256: 60e08fde7fd5710037ca6ccd43eb2b66f98ae4db7585505a4f1f59e84b16b8fe
font_01_sfnt_off000109ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EE 16608 bytes
SHA-256: 448177d7273c6696152ea5bce5a062055fe9291eae16944fd7a587415ce0770e
font_02_sfnt_off000134d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1