Malicious PDF — malware analysis report

Static analysis result for SHA-256 a090aef486da0aa4…

MALICIOUS

PDF

66.5 KB Created: 2021-10-15 15:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b1bd7e39130daa461b9831c0d0129d0c SHA-1: 4dbd04fe908d03218e5f80d57ebcd5572aac41ec SHA-256: a090aef486da0aa43953b09b5046d1dfa8f80048650f3b9e20a779a94e6f069d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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.tahitotfalu.hu/ckfinder/userfiles/files/kogofosujitibe.pdf In PDF document text
    • http://bluekeydigital.com/images/pic/file/67316686389.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/gunolivunalukuzipotorug.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • https://clubelsendero.com/img_pag/file/98997516352.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/96934954048.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/97849028341.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1632462838.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/terodidasivek.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/98905673074.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/436a83736a89fd6558647fff558ff498/57311957269.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/dutabowirapaba.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/17356335851.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161676f2bcbccd---96260297054.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/57530734136.pdfIn PDF document text
    • https://portofcrotone.com/dati/upload/file/zatir.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/16398464428.pdfIn PDF document text
    • http://ruiqingchem.com/upload/files/78960338748.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/955106b82096c43e69345dc66b0d3dcc/44045439907.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1e435d256---nijugakifisigotosudenat.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e36b720871---gisagaparisisarin.pdfIn PDF document text
    • http://hueide.com/upload/files/fidasin.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/896FEnmJZlk/uplcv?utm_term=failure+is+part+of+success+quotesPDF link annotation

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