Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e55580edfae3b6…

MALICIOUS

PDF

79.7 KB Created: 2021-08-12 04:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01eec48301a92f84da085f0ce57bf0e2 SHA-1: bb75e61ce6fd1bd61f0e88c8beb9eb56ce9ed26a SHA-256: 49e55580edfae3b665fea2ba3d6e0a3b9d5614241e8e755ea90b69658a134037
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The presence of multiple external URIs, including those hosted on compromised CMS uploads and disposable domains, indicates a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9159

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 https://chcial.ru/uplcv?utm_term=google+maps+send+to+car+ford+sync PDF link annotation
    • https://299-45.com/CKEdit/upload/files/wulexajubadarule.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/98899122990.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/32306616133.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/vunomigofofikulafuf.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607381572bb51---dokanimaviruxarizus.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/6bjosii7epdf3if823q79nrvs9/kewutiwiruwakifub.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/f19bkotumrob3ta46h4apq7pg3/dogamipo.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2d15eecd9545435a3e33dbe7d64a3350/30229619504.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/begexokolinixavixemotupi.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/zumob.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/62909265630.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/bukasupafefugokaluzip.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/2neo6s62jfmblaaa62f6bj60b7/39553468009.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607938d4d01e0---92039791411.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b584f14b5f2---42933867655.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/ranogozexe.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/032eb1b26ee62fb2bf37aeca6103042e/86851202052.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dca75fe852c---67744285319.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5adafdfb---53145866529.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/gitikixi.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082210307bbf---86087089105.pdfIn PDF document text
    • https://bloc-immo.com/images/38362479257.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/6d7a7b2a7bedb2663b9cba478a00257d/5534732130.pdfIn PDF document text

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