Malicious PDF — malware analysis report

Static analysis result for SHA-256 3082406d37c22645…

MALICIOUS

PDF

44.2 KB Created: 2021-08-01 22:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: f418b47fe0bc21b4afa8df347f9579c0 SHA-1: c302e4d40a4c8b27282afa35f38ddc56c71b5abb SHA-256: 3082406d37c2264547c354183e0e1ba464c3dac69dbad5211bc48c10775c636c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7749

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=practice+writing+name+worksheets+for+kindergarten PDF link annotation
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/binuwu.pdfIn PDF document text
    • https://arabacioyunlar.com/calisma2/files/uploads/34972920091.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/bozofowaba.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/41782090263.pdfIn PDF document text
    • https://ive-cal.it/file/38825011275.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e259c63cfeb---47092469998.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd9f70fb9b---majedar.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160acf44b34977---wupekadurovunojogiro.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c18a235790---xukaxuvujoson.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/65212696336.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/95912496624.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/17107330656.pdfIn PDF document text
    • http://greenbrier101.com/userimages/81965743555.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160764bb51b6ab---73191505632.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/48990960414.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c4be7a7b25dfe529da4c4757bff8f21a/55218692453.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161060147b71cf---98347472095.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/1627337418524927808.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/776tvkdjin4jg44o5j5n2qkno2/73741959557.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16093da30598e9---zowuviweruwutubavidu.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d4ce45a6586353b8f2d59c640132ba70/97013573387.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/14692869296.pdfIn PDF document text

Related samples 8

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