Malicious PDF — malware analysis report

Static analysis result for SHA-256 513c17a9b6496130…

MALICIOUS

PDF

48.4 KB Created: 2021-09-06 17:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6e3812a7fa0ef81cceb53cd2ac91f174 SHA-1: dea812f96ed57dfe97dab94d1e08eb1dc5d51ff5 SHA-256: 513c17a9b649613021be295856ccefe439ea7021252282a5fa02f8b62db23f34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6834

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://pixomot.ru/uplcv?utm_term=bearing+size+table+pdf PDF link annotation
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099049a7abda---32877170422.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/gizovabifi.pdfIn PDF document text
    • http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/fafadatusajimuwerozesufuz.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/xupujivinomefamepa.pdfIn PDF document text
    • https://anjingliar.com/contents//files/23543606033.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20217155285095.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/4466498168.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/4854af13d499eb60a01d0714ce7c4d91/69529940244.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/62aa3ee0b4cf28eeca2f5bac41843e05/22252695706.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/xisefifoda.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9437cebb55---38901226489.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/92214608399.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fddc41725c1---xavezafomalug.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/kuvunosojopumudobozavap.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/81141159351.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/15758231049.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/15930115187.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce268831a---xedebupigap.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/pebisipazupot.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608539ed473e7---75263636769.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/68088450990.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3c7c27684---tanufemavaf.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/fdf8njcp9d77v2tk6rjniv6gr2/73794820742.pdfIn PDF document text

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