Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4109356e0b35313…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 03:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 69541c499acfc5805ba6b4738098ff1e SHA-1: fcca300ccff76c18d9686d349c7d505ee6d3a0b5 SHA-256: f4109356e0b35313c36ae2298d959d4cca130ff3e50f08cef7d7529d62942a3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it functions as a link farm to lure users to malicious destinations.

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://synerhu.ru/uplcv?utm_term=contingency+theory+pdf PDF link annotation
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/agdeghae5vvinni9q1tcup0tic/fibogoxekaruga.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/4250633790.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ad74d58ede4---ligalozatasobusunuvaxe.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6bac3c74---mozusekegidusigaralonop.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/12167246189.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/5a80527de3f4f4552acc588f94f64179/73988095222.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0570368b---46259204478.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098889a34a5c---mavil.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/e3gpgcju4qn1364sjmfr5s4p81/pigikogevixuw.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678fa40d48---48151355245.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/67337479034.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/397f4066ad0628388430464da084f248/kixazixusaz.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3662627e9---42141777513.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/75116b9a0b9116b72014378f2166a61f/komabo.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160708ef4c4b9a---rajanuvuxizoxoxajo.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/90555268434.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/rarefelo.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c29c2a4be---85150122413.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/fuledarifexunozug.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/29952bc1e53fc70f5670280479f75f65/numabomamuleziwaj.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce83dce7f0---wamop.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/tp0g4i6acg5sffu2dak2n3l8pv/11723602241.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d62fdc7ab58---zarakazituvixewanelape.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_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E1 17004 bytes
SHA-256: d9210e2e85e22043124231cf91cfba720668cdd64c465ca4a8ce4bafff16c8f0
font_02_sfnt_off00013512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13512 10668 bytes
SHA-256: 6c65fb7999b2e0ebf54e7da36b25024a759a289a43f46d382ad481eade370399

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