Malicious PDF — malware analysis report

Static analysis result for SHA-256 74512d13915c2a90…

MALICIOUS

PDF

101.2 KB Created: 2021-07-02 17:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b74883aaf5d43ef80d7d28c023125f77 SHA-1: 643b983100c3b401acae9000a4526154ee739c47 SHA-256: 74512d13915c2a9062b73f367c86d39f6c81c1378031e9cbbaf266ffb1fa2282
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The PDF structure and embedded links suggest an attempt to exploit user trust through a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071f90f97d4b---nuwuroxotetezazid.pdf In PDF document text
    • http://daiichihr.com/uploads/news_file/vedaxegegusafewenor.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/i310r7ng90c9da5vnnr4kacm6g/balejorolavemune.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5cbcc38f4---42041557996.pdfIn PDF document text
    • http://aps-mes.com/files/file/rufixifevumel.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/h852nkqanb6ce7k0lg0rmhl5r1/rajozisubu.pdfIn PDF document text
    • https://susta.vn/userfiles/file/73387456534.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/2d10f0a241856e21359705ae19d7acaa/13095500348.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/15822261833.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9d652fe8c---motaxob.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/067a688b31df640fa8f61699011ef018/pivuwazekobemanexuroke.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/97071503666.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160820c29cb610---dorojuresufugajumegufi.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/35017083981.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/1798335878.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/jifaseve.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/58390920295.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4375363e31---zepafukubalatog.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160899aba9960b---75683098389.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/f50eee5583c1507a7f91b02c94666f6f/doraxelutakikobufapolox.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/8322338861.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/tekokijujefujawe.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/9c697ae5b071b135d9ec25d6b5a09045/wajosukesajowidadajejof.pdfIn PDF document text
    • http://roocenter.ru/upload/file/90280366312.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22c0d83b09---lawepugotixer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=o+what+a+rogue+and+peasant+slave+am+i+meaningPDF 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_off0001230e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230E 18400 bytes
SHA-256: dacdb130f5fb6269508005d8582647044e0e68dda2ffa5cea855e1d1af4e6d44
font_01_sfnt_off0001539c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BB3 11116 bytes
SHA-256: abf2f264be948d0bb857ee3520a15e8b34530624266b9761c5984d94bc1eba26