Malicious PDF — malware analysis report

Static analysis result for SHA-256 898e0fc85668ed18…

MALICIOUS

PDF

63.8 KB Created: 2021-06-10 03:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bae6d3ace2d237ba2245cd584e78f909 SHA-1: a75d721d9d9cc3d4cdfb4c3dbe3d9516be0f526e SHA-256: 898e0fc85668ed18b62b375bf3f5cd55f72a65ee0f09842b48c97b137ec1dc81
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating it's a phishing or trojan threat. It functions as a link farm, directing users to numerous compromised WordPress sites and other disposable hosting domains under the guise of providing a 'chemistry form 2 notes pdf free download'. The embedded links likely lead to further malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8441

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://oniceh.ru/uplcv?utm_term=chemistry+form+2+notes+pdf+free+download PDF link annotation
    • http://aarogyamedico.com/userfiles/file/bexatujujifuguru.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc480ed152---pipixazafaxamipom.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbccfb3822d---fowipupipomesijed.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/74739300152.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a8f60f16cf5d9c8b42bd086f955f58d7/muxuzalagajafiwoz.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/773d6398e209f5325e5ab5c8fa4bf4e0/40036959386.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076376a17e2a---30618653569.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091f559beb7d---sapifavuvodu.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a481badec52---lejidebij.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/20c4a760b5265299d6d3b49419a51c4f/zarabid.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6ql8ds99jj4vli77h4kr0jj6ot/lebamabazozuretamukewuvu.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a369e8ce37a---dokixowo.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/22124ebba795b4768fff0da0a173a1af/kubiworulorogatije.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/tenijiroguxidarebobok.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/rabikek.pdfIn PDF document text
    • https://gawwaclsc.com/app/webroot/upload/files/58663985147.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b70575cde---sakibisuxemelevitol.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b35d91a87a4e78a46f0e430a8b8d7f7d/zegutukipizironu.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090d61201f5e---47848091333.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5420 bytes
SHA-256: 2d197e4c3aa1141fad07b144b1df0135ce91d295529ced1f7a69d63ff6e8d4c1

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