Malicious PDF — malware analysis report

Static analysis result for SHA-256 912abffa35146910…

MALICIOUS

PDF

62.4 KB Created: 2021-09-02 00:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 172f40ec2e0823c217f922ce0f6b34b0 SHA-1: 3b1eb0fbe729ae5aba1a631d8ad04bcae5d4e7e8 SHA-256: 912abffa351469104df3dc4ad3f8b5be9c8baf1083c17b840a0fe931d568aac3
94 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to PDF files hosted on various websites. Heuristics indicate this is a link farm, potentially for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8923

Heuristics 4

  • 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://mepho.hu/ckfinder/userfiles/files/33248759425.pdf In PDF document text
    • http://trubaopt.ru/content/file/jazadiragefu.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/kemopupafomifefa.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/79382347976.pdfIn PDF document text
    • https://bibliothequeanglaise.org/upload/files/lirojuxodipaj.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed487951b3b---43449103328.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861b2517aba---tivonipiweriluwadige.pdfIn PDF document text
    • https://lasanisports.com/files/tifivukomunipabu.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/78138948551.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f30b16d372---gutafizos.pdfIn PDF document text
    • http://changju-hotel.com/CKEdit/upload/files/91077523043.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/pevofuwinofozonejate.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca85356ed8---mujatobutalegaj.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/a01e7477789833cd6b1434fd26a93b26/fofozimu.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/51706141528.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/rezuv.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/blsku5pn66pa13g3jku70n0psn/95586031006.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a32cd58a4a0---40095180062.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/001b20d9223b75bac2457d4cc1d32cd6/51479023864.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/84704071872.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/gkpcsf8ufg0i1rqmem2q3r4341/bemejasu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/m4km5gg4opea72s13mt0u441fo/nalitakixal.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/pofaregexisuzu.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/fukusogivonomune.pdfIn PDF document text
    • https://tavio.ru/files/file/22175759471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=convert+pmd+to+pdf+onlinePDF link annotation

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