Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d81b301a210e549…

MALICIOUS

PDF

81.0 KB Created: 2021-06-11 18:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-18
MD5: af373993432cb22447b8130acc2dff51 SHA-1: ee7771d1e55ee8309fb188f2cf8c28b92ea6132e SHA-256: 5d81b301a210e549087c78156fbd8c56538a18c7aa8064e0d3bdc09d67b211b0
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://archism.ru/uplcv?utm_term=simultaneous+equations+linear+and+quadratic+worksheet PDF link annotation
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a159cf37895---32944282493.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/4f7801bf6e7e1cdb4f664a4274fddc58/81435939957.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/0658bef9d849edf74b7b44f629879a18/15043451099.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/jafagobitabakejefuvat.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/jevrhpm106f56ieupk03mlv27k/vexuvim.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b0898ece081---xarosanidat.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/puvovogusorajepazofabaku.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/xubir.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfb35482a1---9662166984.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/59832527205.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/s33qbmqs4pup57b4t6jt9k8umf/vabirikupewo.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/4ee1265f73fe9a694d6e2d8618bfdb84/12429049692.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3fd237ec---61364827127.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/bqgopmevag961e4m1qt38lo5i4/37104163400.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/0e45f71e43deb8ef9f4d8e733d65b851/lezufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 5564 bytes
SHA-256: 3908aa78b24d21a5e1dbab949e7f7af329c0fbdf60d9af3c1e0ffb1aa560b4ab
font_01_sfnt_off0000fc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC04 11036 bytes
SHA-256: 515074f7ebee46edd635ecfcbc86332bdd903dac3a87984edb761dc9f678bf51
font_02_sfnt_off000121de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DE 16100 bytes
SHA-256: 4a3d97cb0f01b67db0f2c0c67b38c82a67e4beafd846d3a18a1ca53b20acedf2

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