Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f897711122042e9…

MALICIOUS

PDF

62.2 KB Created: 2021-09-07 02:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b0d4a09264425ea8440df6cd026381f7 SHA-1: ad2afcabfa7e91f30d4b46b59555966b5dd5e0b0 SHA-256: 9f897711122042e96d7bedde85fd183d660cd00c390cfc520c50959567d96d3d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The primary function appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5897

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://huntic.ru/uplcv?utm_term=down+by+the+salley+gardens+britten+pdf PDF link annotation
    • http://kstarsmall.net/userfiles/file///sererekivijasozebapi.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/50805781293.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/xosozupeka.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/6d46e63ac4b9b2367698107120b726f3/lavawumizukusisefunog.pdfIn PDF document text
    • http://centronegozi.com/public/95832399722.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161082f3b1f661---67933955431.pdfIn PDF document text
    • http://recrute.fr/files/files/73902776792.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/90421025313.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/25938007393.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/nisukamemilibin.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/afa0usoe0a6se6d5js4hdv409r/gugedogav.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609007cb56bf3---mikipituxif.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/viwoxabeririviv.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/79456778033.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210516025644.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/tulugafinabawo.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/4590e80b5a9fcf7b350ce8c8ba4be54f/14241027612.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/xakogu.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/43768303388.pdfIn PDF document text
    • http://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/98587848476.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35bb5d9a0c---dosavuvozip.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/farikiwujijad.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b958d2c33ed3766f3a2dfdc344b9eb10/bajabibuwivaziwigo.pdfIn PDF document text

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