Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da578f2b0d6cf12…

MALICIOUS

PDF

58.1 KB Created: 2021-09-08 02:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a8d7dfd827e7866698d22f38cc1ef3a1 SHA-1: 35e0014db183e0b7039e3fb6e5124022ec8fa7fe SHA-256: 2da578f2b0d6cf1285fda97a58d780f4cb80e0608e34fa851fa5835c9197e3d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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 https://drafthe.ru/uplcv?utm_term=lillesand+and+kiefer+pdf PDF link annotation
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160707d7857146---22514988149.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/mitut.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/40572172216.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/kidenojogujiturajeke.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/1iuikm071nr1dcmbvkgiieu162/wizefagopamotike.pdfIn PDF document text
    • http://vanphongphamhienluong.com/upload/files/34909143409.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/lolutujaxe.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/301325194478.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/99221891512.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8446af5f6---jexaf.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/dosusovexedowedulorur.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/sapevududegisaxox.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b0e5de157d3b99c3a1985b249afb1098/2072030670.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/dodoxenitu.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784c53f2d22---29677807972.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bde01327e17---pugerapox.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16120f24288245---xuzekipenibegogutavuw.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc1300dc31---lilirokoxevij.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/sapakejitagisimugabases.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae1f91a06a---xinokolu.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/bebunitaxidobafesanu.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210820080105.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/i2mgt905mqn18e56s8h45isuqh/24115232182.pdfIn PDF document text

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