Malicious PDF — malware analysis report

Static analysis result for SHA-256 515724bbf3bf8376…

MALICIOUS

PDF

89.1 KB Created: 2021-07-04 03:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b0c5c55d7a22231f09a8b58cf927ef49 SHA-1: cd82a9b54cf1257a1ae84e06033af7e25e84377a SHA-256: 515724bbf3bf8376e29c663d7514d2ef6adf95253aec23ce63e89a163a5c1ca5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/aa24680aa81fe7bce42b907c08bf4ca9/72735841597.pdf In PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef08fec001---13016293482.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5f23ef776---85625799974.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/1614399510.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/0a73d302ec90b9c8abb8826b59da2256/ragapemeribobuxosana.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/1df556997d96546ab6dfe996e82927f1/31661992079.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609457dee6a82---66421715051.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/014459ddc7065eb6d4542993e34153ee/90251220773.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078fd7fa2cda---melagesixemuxiresifo.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/78277988527.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/92302618755.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/1625357660693.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/68d10ea816c0b4504ec51bc99406884b/biparitasaxoxuv.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd88b5627---28613344706.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc67f3bdf58---wapuxof.pdfIn PDF document text
    • http://crm333.com/documentos/file/19011887171.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/a85ba9mdq6t8sonqlgfibjoeuq/84351361309.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/83289266975.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/h6k9g08emf53q0pg9t13jct4s5/45373753773.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160987e5840db5---labefokez.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/f9d95883ac7ded17902b1f3f47b2960f/sajumarofurixibegaxis.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/luwazazebanakeniteruvit.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/29e79cd6fb38c40974140b4f08470e19/ratisalokoxutumil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=land+law+exam+answersPDF 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_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 10244 bytes
SHA-256: 3405f4e0a031a174c9db73e52b5246b4bfd1c56204a4d0789de414e36f78292f
font_01_sfnt_off00011142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12954 18000 bytes
SHA-256: 2cd602b18729774a504b6a161b804acb09995b7d78d7b3a8030d65c05f49d4a0

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