Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90e4ebb912d7464…

MALICIOUS

PDF

70.6 KB Created: 2021-09-07 06:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 834093d00b06c50824d5a15b0f81aebc SHA-1: 49a5b805c68e17af5cc184555acdfa282f0d7d22 SHA-256: b90e4ebb912d7464a357cd140043b37c2d2464d0af0ea4d060790e65327abd5c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5460

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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e9ba2a352---16404567425.pdf In PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/00152e36544a167d585a7db50deac39c/gamekoluferowilepabotuf.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/8790833753.pdfIn PDF document text
    • https://onecre.com/images/content/files/45824245898.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d49906ead1---99663171522.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/katitagexez.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/6466583272.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/zajekutazuzufetupoxudoxav.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/lotuboro.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jf2v0l76slum1i9csrc8po70hi/11318879677.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368c4b79630---remikodotitixedawesi.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7881c31032---66923427219.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/lasudavipamuxarofatapopa.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/tivemazesaruwakijes.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f01b82b25---jagiwarosubemilixepoze.pdfIn PDF document text
    • http://retailcop.ca/files/98827061659.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/42973830188.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb8168f582---mixelejizixokulifo.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ooh16q2mreml59ara14mr732f1/54854376044.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107d80b5e48d---31408346882.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/58137071392.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074907add088---8551933901.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/nexedesenajajuzotuti.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/13396044627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=caldera+peisa+unica+manual+instruccionesPDF link annotation

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