Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d047c7efcbda88…

MALICIOUS

PDF

44.2 KB Created: 2021-09-27 12:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9ba5bbd89a5bda6411044c958f594992 SHA-1: ab0b5843a96b4399905da7c48811b00b4cf41589 SHA-256: b8d047c7efcbda8804335a27b6a016b9fb39665de1a28c6fe05eb30f7dfcde3a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate structure for distributing links, likely to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=scary+words+beginning+with+f PDF link annotation
    • http://irollee.com/userfiles/file/wejaro.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/puzafoboviradofilobumisez.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/geramunanavibe.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/11648266356.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/82026474441.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/xawufoxagafujogakise.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4b698d4b7---37596655252.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/saxixilupilomigezulexerot.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/34684174253.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/wekobinukaxupiragis.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/37811407147.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/sapuxamagogipojipogekowad.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/73350667100.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/94441344054.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/samiridovufopatujizomu.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/31469700262.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149be70d8bbf---sugez.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/latozolusi.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/52903270841.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/pugixitowokakoxumobex.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614daddd64747---497575842.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/wusulal.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/79119269586.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/89570412487.pdfIn PDF document text

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