Malicious PDF — malware analysis report

Static analysis result for SHA-256 58456e8c242750f2…

MALICIOUS

PDF

99.4 KB Created: 2021-07-02 00:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c39cebce667692a3b91c0759a1177be8 SHA-1: 2e6428265b439b905139fc2422fecd6cbaf6bd0a SHA-256: 58456e8c242750f2a5996a26e84f8d9d6a5a3b1528adbf39935bf19fdaaf88f3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this as a phishing trojan, and the ML classifier also flagged it as malicious. The primary attack pattern involves luring users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://raczcsalad.hu/files/vivofuxiw.pdf In PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b45c20bfd3---34274282517.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a59e16276---61438751115.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/nepusamiwurazaxemosapus.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ul5c6ujkkvnhm841dfnruvsknk/lobolusubove.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/uraqrh2ifm0jvn31h6mj83cm76/37244080518.pdfIn PDF document text
    • http://wenxuezj.com/images/File/bojebodivid.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/dalilisigopekaxugefesil.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/2aqf727j8lmvptcap0sdq0ufdr/49387327641.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aefaaeabcc---20520079397.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70408e7c01---niluzizasokezerizin.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f6a65512f---pesuxewegu.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/3f729afc0135ab35bef1d004f9136bc6/dapubomumijo.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b50610cb33a---69998113517.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f55fb1af4---tawodotesulefot.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160876aa2b2495---fofibefemaborenimeku.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/fufobusevulixaxep.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/bi6keh17753417ern5uagl5nn3/wiwidi.pdfIn PDF document text
    • http://webbuilders.com/files/file/worusupan.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/bed3cfa99b4406588b79dee92127277f/57264261551.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/0q7f83lcpuqo03aqfk3ctaprj6/lililofemivode.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429175711160.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/mefudikasaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=jack+welch+straight+from+the+gut+pdf+downloadPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b87e452d15a8419c4baad59845b6741a/43253210968.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11598 17600 bytes
SHA-256: c8897367e0eb6d5bf5872f2806093f5c4540a49e5e54bebf76561e174ff90953
font_01_sfnt_off000143c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BDC 11336 bytes
SHA-256: 77d1da72ed3c1b2186e198feb692166ebce3a6273e1dd1d5b836fd6c8a29f040
font_03_sfnt_off0001763e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1763E 1988 bytes
SHA-256: b97aa58100f8705e0f71fadbea8f2f9bc203df5234e616e7968db7a773629830

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