Malicious PDF — malware analysis report

Static analysis result for SHA-256 675e16fa524778ab…

MALICIOUS

PDF

120.7 KB Created: 2021-07-18 22:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ffd15fb67b5c1305ef0fa6665a970528 SHA-1: 01a2398b65b4372c6ed5e07c423a1e9d0c856277 SHA-256: 675e16fa524778ab98455400e494ab72c79cd958e958d62d07fcc6ed050b1f31
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised CMS upload storage. These links likely serve to redirect users to phishing or malware distribution sites, aligning with a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4576

Heuristics 5

  • 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
  • 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://5a.ro/ckfinder/userfiles/files/mofukupevuxitujatuxifadoj.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905c40eeb30---datipaxu.pdfIn PDF document text
    • http://liberty67.com/clients/41815/File/dufaxadepawamekiw.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c8c96d45de043537466c86c6661dc060/loxowitosofegigumuxosuke.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8b99a10df---zogupewojabudizoteju.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/c01e2f47f0aeab670af5eba06a3bc1ab/rilasuzagowepagevozezoj.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2e08aeeed---6707054619.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab78f90a2fa---xafozedobaxetofiw.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/damepowezumavinefimomimi.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/65915813550.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085a2262d07c---50881787190.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/fivumumedif.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/zipafatemixiko.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/19677133627.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff9dc00e2d---56437735881.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/sezefurefewepizikoxa.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eeb8b737d7---33695341031.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3525a39dfb---11530318838.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9878f1b35---vigefav.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/8ugthgb4m4vlu6jrp779oe7rt0/73208086897.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/6a24b9a1469155a46839d14f0b49cb0b/10434665015.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/fisoxabikinexezegisoju.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///gekiteribu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=repent+to+one+anotherPDF link annotation

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