Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f15bfe007ac2f3…

MALICIOUS

PDF

62.3 KB Created: 2021-09-04 13:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e72a3186b23f04ab925175fe30c0738c SHA-1: 24ed24e96abafc3dedf47176332435b3de716a4c SHA-256: 83f15bfe007ac2f3a865b93011fa4c86fe2d57f85f1c732d7361811860c248bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6913

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://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160879322b2d30---gosinasudakikal.pdf In PDF document text
    • http://partnerplus30.ru/images/fornews/files/36114444865.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c70389d08be---46305671153.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314a3dacb90---bodibitemukadefowedajowes.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/58203271971.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/vukobodi.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d793bad7aa38c55895cc0af239d417fe/golejajuzuganas.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050707001973499.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/74938524185.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/1feb5e7d65b050f8cae6766c23198624/10986799219.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/a1784e1af439086e13813baf730d6e73/moriketiwiwonete.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afd81544aa7---6426480554.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/790ab8a36414d78fe6c6959266799953/nogekamivimosepapawetalib.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2u60ro8vlt6pdjacdkprnd9rv3/15025870013.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/puranadexafabuk.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/buzonobezamuper.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/5382066951.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/kivomegip.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aeede38971e---75654598861.pdfIn PDF document text
    • http://www.siposferenc.hu/html/butonojizowowaw.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/85572685969.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/8e9e523f247b1472893d5cd55ea7cc6c/vidot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=nuance+power+pdf+convertPDF link annotation

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