Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa24331a1567dcf1…

MALICIOUS

PDF

47.0 KB Created: 2021-09-07 07:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bf8b9b3b36d548bdb7164a686c56453a SHA-1: 414a41c62edb09cdc717cb84664648e522cb6785 SHA-256: fa24331a1567dcf10fb6bb96a7577bbd1c705c721cf2199774a8bc496791e879
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5712

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 http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/32414489166.pdf In PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/7580428914.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/jemavopaxebesebeli.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/60886cddd885d546df1c581a7e226f77/19032184252.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/272dd5074cbeb7d61fc9b9ac99ec7a9c/resarepajoxidowafuw.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160803b6f75051---45265103080.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/mubenulobalotabokabija.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aeef5b8f2---90514800521.pdfIn PDF document text
    • http://newmob.it/userfiles/files/lemolibazafixud.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/jibodajosafodugivubewusa.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/43064656894.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55d1f63e92---tujizesowegozusopixew.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///20216315206143.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-6/20210506070354410620.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/vonugiresutad.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/gububasuk.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/ba3285773d8234ec31a771ef15fa3f3f/34492530760.pdfIn PDF document text
    • https://sieseam.org/userfiles/files/fudofenovidemevazarevo.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/9a0973da826f36704be6105d00ba4bfe/kipemam.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/zuzajelibitutezav.pdfIn PDF document text
    • http://articolo17.it/siti//usr/foto/files/sovose.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/2accaacf70558c0646d387287b24e44f/51585598394.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/67150904243.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/76797540817.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff8644c5f8---79276758096.pdfIn PDF document text
    • https://netpage.info/userfiles/file/66825749102.pdfIn PDF document text
    • https://buka.ru/sadm_files/baretapiguku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=unitymedia+k%C3%BCndigung+pdfPDF link annotation

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