Malicious PDF — malware analysis report

Static analysis result for SHA-256 492c6769a98892aa…

MALICIOUS

PDF

64.0 KB Created: 2021-10-13 14:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4bc8464d6a517016bf6159f299cddc28 SHA-1: 703f6535d98f6a28fde0482713eb15ca02da2775 SHA-256: 492c6769a98892aa308dd29c14d989df882cd64a208fbf2a8ad7ffb6eba9e36b
64 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous other PDF files hosted on compromised websites. This suggests a tactic to distribute malicious content or manipulate search engine results. The presence of multiple unknown PDF URLs indicates a potential for further exploitation or malware delivery, though no specific payload or execution mechanism was directly observed within this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4986

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://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/48a7a6a48396b621671b9ef8a513eca8/57251097775.pdf In PDF document text
    • http://citescolairedeledit.com/include/file/15950404586.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-16/images/files/bapubetalij.pdfIn PDF document text
    • http://shesob.com/file/files/miboranazek.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c5c95f5b8---25471882902.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210901_E083EE07DEA44C83.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/14725162839.pdfIn PDF document text
    • https://www.nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/gugumowoge.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/kuvoxirijefufuzokuro.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/46778399056.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/kapukawesuw.pdfIn PDF document text
    • http://tenis-klubmoj.si/uporabnik/file/tisomofegelajeberuzuzo.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/robowoleg.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20211011144554147.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/79619725525.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/zuwetonotofidebopisepa.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/60103004753.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613464bf1c555---7878937231.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/tetanax.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/kalifajivoferede.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/59025973066.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-7/20210907231522577742.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/notovuz.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/nisudibavamaxotowarefo.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/tgwjJlsMqHc/uplcv?utm_term=how+to+save+a+pdf+to+your+phonePDF link annotation

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