Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0bc7b30fcb5cde…

MALICIOUS

PDF

88.2 KB Created: 2021-09-06 22:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1260a5d14a073d6d8359009bd1e05122 SHA-1: e7bbdb769b40d41a365bfeffde726cfdf6d06060 SHA-256: fe0bc7b30fcb5cde1baf421ac8c23e1495f34e664d935aed00d09ca102a84945
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links aligns with a phishing or SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3938c8e9a---rileno.pdf In PDF document text
    • https://vienhung.com/webroot/img/files/luxusitirimowedojotoji.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/ramululirajowogoxuzum.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/54vuguhpbuk4ljo0u73r7l2f1g/91799466991.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/sosunesinidumulukolunezen.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/finaw.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/9479e4551603fa6f8707f8f3e352067f/93087528693.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/36957685747.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/5e1dds9vn0j5v2so475vb7t0mp/xaduru.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/52816652526.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/jozuwe.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/lukujafifipaluduwo.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/o2hhdf8gugvqm1vcmqka7t4h5o/fewugasaxoroxoxeguk.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae1ec6d4f---16852209814.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2a39e8763---40445526595.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/31203790969.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5026e0c376---vupedokabileleropibusasof.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2fa91a3122fbe5a8393bd6c2e922536c/94853562515.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcf0d0ebc0---kuzumumadaxotanufa.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16088297c8969a---82987319506.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210731_235211.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/7811392495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=rectifier+control+of+dc+drives+pdfPDF 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_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 10564 bytes
SHA-256: 4dd1adf75cc118b97ef6e6ce7a900982bd6111123414f48b65c2995baf68e9fe
font_02_sfnt_off000125ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CA 17640 bytes
SHA-256: 36ee9b074960e403ba7a8dddeee90adf65a9b9e0001f36665947a01798f18af6

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