Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadfc0f07f759988…

MALICIOUS

PDF

71.5 KB Created: 2021-08-25 05:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 44847aeebb964252b3168535f9113b89 SHA-1: f74329649a6bc78265c077fde089dc6f6d8c0dbf SHA-256: eadfc0f07f75998815089cbd4ed3f626f7269998aa7806f7e4f6d893d89cb1de
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristics indicate a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8991

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://garglob.ru/uplcv?utm_term=data+structures+and+algorithms+handwritten+notes+pdf PDF link annotation
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e41f835d7---85789004607.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/pitevavebodefum.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58a3c33bb---60786886291.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/zosomewad.pdfIn PDF document text
    • https://fivetc.net/uploads/files/91045481224.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages//files/93181236332.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/wemilatibubexusomodub.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/68528983695.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/1a7e5b7f543cbd522ba4d3d9762cf5fb/20764389041.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16078280dd406f---foxitikelaj.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d70037ebb46---66697533318.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/42ebf47b2491a0ccdfdbab3aec5a5afa/gosapus.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/88927516238.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/3042784068.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/xaburanexofapazobim.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a11afd44ee---91209443579.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/50589936828.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/iopq1i336a6pse9qdg92drhhnm/ligaxutobepuvas.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/zifanon.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/janowiduk.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/75122830645.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/73724452771.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/bopozafan.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608588125102d---63931351030.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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