Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4cc4ca8433297a…

MALICIOUS

PDF

89.9 KB Created: 2021-07-22 12:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-03
MD5: 0e8849e979041bca6a635a71900f9845 SHA-1: effccb40c7a24b68d99bbf2a01a8fd90e34d97fa SHA-256: de4cc4ca8433297a39b7c8f6646cdf84d03c445e4c72b55d2113a175ad718f0c
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://interel-rus.ru/test/sites/default/files/file/giponazutiwenitiw.pdf In PDF document text
    • http://files.ibiza-ferien.de/file/59328968250.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/a930cscqqb3vlmk49l8vm4bkgo/vosikevoretuguzuse.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/6f06ae0c8dffd76a5515167dd4e7ff60/bipodufugoguxemavi.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6668a4568b---32381183253.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/wadunobijewakudegeresomi.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/bivusupamoseroxotakubera.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/80238167647.pdfIn PDF document text
    • http://greenbrier101.com/userimages/kuwufubisudevisurunuz.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/26815040587.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/45791077485.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/72856543327.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c038c028ff---30715334297.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/13387035708.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/28532681136.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/14732521144.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ca90b5eb2c5---punirij.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9d2d0680---29926796711.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ea69bd249---tojigoxa.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/80070921806.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/dgvqo3rben9hnabh8jp4m4clb4/22028685059.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/81793385d1750bdd5537e5cd1fe9a6cd/85737117250.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1621396726.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5d3cf3563---rirubagipisukezexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=5+virtues+of+lifePDF 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 extracted file (font_00_sfnt_off0000fb7f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000fb7f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 10144 bytes
SHA-256: 01dc46689413e52a6e95da2644aa0dddce0a57542e9200d0011ec73610bdf11e
font_01_sfnt_off0001125c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125C 17500 bytes
SHA-256: e7828def8a821a7ab18caa16d1d39b2875702670d47565f2033d19b76d3bd5af
font_02_sfnt_off00013fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1