Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adba5d254a90197…

MALICIOUS

PDF

85.9 KB Created: 2021-07-12 22:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7eeba65dd395eeae316c540f155ab4fb SHA-1: ac3d2b56697691250d365df5d8128087515bb49f SHA-256: 4adba5d254a901970b4f56ea26fd1cb1b46328a001383027a1408dc2f413ec86
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to lead users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple external URIs and compromised CMS upload links indicates a high likelihood of phishing or malware distribution.

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://pistant.ru/uplcv?utm_term=managing+health+and+safety+in+construction+pdf PDF link annotation
    • https://aedwea.com/upload/foto/bosabuvuvufabapef.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076d594c3774---zagemebagoregojinevalis.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/kebukazewajoxajat.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/91742766387.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/59493439795.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/jelada.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5ebe42de8---lejekafukogabek.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/9ailaocvvetk5otvaha52pj301/tujamozobajov.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f35520ebc9---44322249963.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/1434789833.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/51918433045.pdfIn PDF document text
    • http://briarcliff68.com/clients/71184/File/11086836804.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/45ef8afc92d619c02d54dc05d40a5ef0/kuzepimi.pdfIn PDF document text
    • http://henrysadiereunions.com/clients/876463/File/dodafezujisiwekakaziru.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/058109c0257e838081555cab7236d6cf/poputigiruvigisi.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f9c7a2476---dezipadoja.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/90439844825.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/vexaxepakapi.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/jagobunixakokifune.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/ssohed0kdgtq7ji08ortu900cb/julevusuf.pdfIn PDF document text
    • http://hongdacable.com/d/files/13112725551.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2ffbb9e03---62079696339.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c037934601---wuridozodikugawane.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_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 16444 bytes
SHA-256: 2c2a7c12d68fe2fc33f7401f71bea2e3763148cd74d390532a5054e97dd6ccbc
font_01_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 11108 bytes
SHA-256: 5701fe776fe1d205cfb626c3c9e6b2b53d1f4efac095549940931a66d63db080
font_02_sfnt_off0001320b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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