Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec982c94921360eb…

MALICIOUS

PDF

71.7 KB Created: 2021-08-17 11:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 68b905271c2ee97383795815f8c5b8cf SHA-1: 50c3de9051db0ef38310853ab1b031adacfa3cfb SHA-256: ec982c94921360eb70609da76cdd267daa2d091f524aa47b94c5f1395b5a0b73
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Embedded JavaScript is also present, which could be used to further exploit the user or download additional payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://cructi.ru/uplcv?utm_term=daily+budget+excel+sheet+free+download PDF link annotation
    • http://feach.ie/images/uploads/file/fonudejizogeg.pdfIn PDF document text
    • http://argumentua.com/i/file/67584110981.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc805dc3e---vilisuzamenuvebaf.pdfIn PDF document text
    • https://alutat.com/data/file/61828747252.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16089b3020c28a---74544508603.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611953bf725b4---13769987802.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8vrati6fshv0d0ao5khrnds1hu/tefujumidepedurajeden.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/67568480760d3ee456fe23.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/20544718935.pdfIn PDF document text
    • https://manenshop.com/upload/files/gawepimijididimobexurif.pdfIn PDF document text
    • https://efnnma.org/files/file/kalivadojewum.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1ab06a8006fafe44b96fa3a597be83a3/7655383767.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4557bd0f3---tudejen.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/65362875640.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/46228170556.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/524b8909069293dc2329206b311de5d1/jejanas.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099643b259c7---tadasigiluniwerigepemi.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f38fda4fe8f---bubuvepuduposibebitop.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/8soursbfhoajtoi5f4cjo5so05/72091881719.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/javobokoketurumawurujotob.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/legasusiledemakogizivula.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af921713636---dimupebuzanafepojujuzani.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_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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