Malicious PDF — malware analysis report

Static analysis result for SHA-256 323e064e166314a5…

MALICIOUS

PDF

56.8 KB Created: 2021-10-20 06:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5ce1174e8294f303c760da700970d0da SHA-1: dde29f02bebadf5a61dad127361b9a6640c9b5a3 SHA-256: 323e064e166314a58034d9ab2b751afe369604288eef74aeee8c9731f26cf4ae
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to external sites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a malicious intent to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4354

Heuristics 5

  • 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
  • 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://chuabenhxuongkhop24h.com/images/files/83585676905.pdf In PDF document text
    • http://qdsenfeng.com/data/files/ligorobuvedumemana.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/14391504450.pdfIn PDF document text
    • http://4bx.pl/public/file/jipurodisazotasa.pdfIn PDF document text
    • http://gabortech.com/admin/file/tulovenive.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/13013149151.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/32100300192.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffb7d95755---63442812148.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614d937366b84---69704581385.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/62017751970.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/gemeluzidujopoda.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/41837656282.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/130926587545.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/zutowepojunimatuzib.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/18089933501.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/45334462338.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/dajolafekoguxomuku.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f0383a4e7---63100168566.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/sowofinisiwovede.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/gabezatipa.pdfIn PDF document text
    • http://iccarrentals.com/files/file/62610280221.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/92304659638.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/gafokemekopategobeli.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/25594427366.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/94f8e97c6a784986d8399be0201661ec/93668254502.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/butep.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/78799558136.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/TSvcnjQ06Jg/uplcv?utm_term=amharic+alphabet+writing+pdfPDF link annotation

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