Malicious PDF — malware analysis report

Static analysis result for SHA-256 470ee0377a15f4db…

MALICIOUS

PDF

81.5 KB Created: 2021-07-08 09:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a20ec797c820eb0e00c44e605867bbd5 SHA-1: 203e01f4999de14916805fab229e4d06d374b8f5 SHA-256: 470ee0377a15f4dbd7b709e31aeef71e4e29777b8ce72d2af999da7c6770b7eb
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or potentially malicious files. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a deliberate attempt to create a link farm for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://laatjehuisweerstralen.nl/upload/file/sebot.pdf In PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c926f90c8b---22771349290.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/16735628177.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/73284589853.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e9a58510621bfc6bc7dffe558d725ed6/44485213068.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/kujenogudim.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/tigegezapugolilotedoloda.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/15818030924.pdfIn PDF document text
    • https://begili.com/uploads/image/files/dorikelurukejofegup.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/8at8vhia977p7m898qsh5rmpgl/bedofejami.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0173f4224a9256f30c9feb2a33052eec/nuxike.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/61806085277.pdfIn PDF document text
    • http://iphysiology.ru/upload/zizixizoworusanazife.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/90729401097.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/d7495a507556011fc452d40327c1cd2c/83836305685.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/gididagikotizi.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/panetuxekefomos.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/47ecd5d74fda777966547f564ce88b75/xopuxoto.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5bb4eaab4---sonowepegakibivigiz.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073adc1483c7---76078824452.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/jif1hle55p2kbkjuj507gd0k77/siwozewobapipozifokuxa.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/85055108044.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c227e2d2b8---56193670957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=5th+standard+maths+book+state+boardPDF 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_off0000db6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6B 16624 bytes
SHA-256: c53e58a39efcf9172ae62fd1119abf573a97896dc61c67fc10c824af6423e16d
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED3 10644 bytes
SHA-256: 6193cb294d6736646bb9bbfbd6475d1e8a30562dc8ccf9a2f810d2ecf6486a15

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