Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb9592f7a80528b…

MALICIOUS

PDF

48.7 KB Created: 2021-09-30 22:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7eee78ad4ea3bfb90facacb72d23dd0a SHA-1: 6db2eac04030bd935f3acc9f7e22d5b5a849efa2 SHA-256: 9cb9592f7a80528bfa226d74e0dcd65a17e3a1fbfd647ddd7672e2c9c383d233
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://thebankcardservices.com/uploads/files/83220346371.pdf In PDF document text
    • http://irinabailey.com/upload/files/23243828751.pdfIn PDF document text
    • http://slotkuda.com/contents/files/2971910606.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/lutefedi.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/03149f764850826ab7e9db100ecfff23/dikapaguzixufukidalizade.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/dutawetedafimetumazuten.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1614c1c2f17404---53427976033.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/5895072009.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/15053999471.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/61340355856.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/50757517977.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/66666720127.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/8683433208.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151fc47975af---33406426566.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/58321858582.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/96601127629.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/pivoguxefafawekulo.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/41396112061.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/bd5113e1b988027638cbe174d3e8a578/karezuresuwaf.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021928108572551.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/78166686542.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/63792946480.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/kj9jcg055j09qubj9doqjo06o3/lufudufubasutotokevo.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/720dc45d31c549a3b0044d8c0b398f55/bufipe.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ce688fe3f---40769470592.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/gafilutomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=lock+settings+androidPDF link annotation

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