Malicious PDF — malware analysis report

Static analysis result for SHA-256 693c42e2b5ba155f…

MALICIOUS

PDF

59.7 KB Created: 2021-07-07 06:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2b9acf265dfc3e9f553f35a5c5d56744 SHA-1: d7ee23d57235fa3f301a4fb02d2f26178e9c7cdd SHA-256: 693c42e2b5ba155fcaaf39cecde53fe6abb7e6162e768004fd41e26350d20071
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The PDF also functions as a link farm, pointing to multiple external URLs, some of which are hosted on potentially compromised or disposable domains. These factors, combined with ClamAV detection and ML classification, strongly indicate a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.srijonihealinghome.com/fckimages/file/mopamesure.pdf In PDF document text
    • http://sooclose.eu/upload/File/95080238195.pdfIn PDF document text
    • http://mopron.ru/upload/files/sisepigilofa.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770f7e32a5e---75735343537.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e4a56f5a---lazotizez.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/paweputudarawiges.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210525070834999807sgzcj6.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798786c1491---87909206390.pdfIn PDF document text
    • http://ruresept.ru/files/file/xugamozetupafekikur.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930c7a4824e---damepitavopozozotowudage.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/3da9c94843f9803c4bd4511504788e7c/30549756475.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/64274056312.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/rexataf.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608517b2488d5---lopodorejam.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec6a00341e---laxidubarawabaxolewite.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160cef17a8d90f---legiwudi.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9dfe4f465---majobezodu.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cba5431266---monobed.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b90b626243---47436626998.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/32688802609.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/dipanavuwapuzolepisobigap.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca866eafa2---ligabozuxudokusiw.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/50613511795.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a978176ba48---93886019072.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/61829573436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=things+to+do+with+watercolorPDF link annotation

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