Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e289577fb8bc6f…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 11:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8edf616576965b775e2862006adae54a SHA-1: d0023dbf6fedd1924c19c0f7b64e9a873273f949 SHA-256: d7e289577fb8bc6fa857938afea9175adb4fb44e7a7268dc17b04f043b98a4d0
154 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Several URLs point to compromised WordPress uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. The primary attack pattern involves directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5355

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 http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/3b393a7cea0997c980cb8587d8ecd2ec/84589785624.pdf In PDF document text
    • http://daehwa.info/uploaded/file/nusiwikasumiveduvunajab.pdfIn PDF document text
    • https://dintek.eu/uploads/file/17257647615.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161000521b64cb---xodifufazavuton.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611e863a6ecd2---wijuxezuw.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/poxuwavojij.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/24780957285.pdfIn PDF document text
    • http://zuche0551.com/upload/file/35405537542.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/gonez.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/tozusumogepomi.pdfIn PDF document text
    • https://petala.gr/userfiles/file/kifoluf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b45acb3949---falifef.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ca64ba48.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/je6433tqjlddvmjookkqf8j0v2/tarokuloxabidubik.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/82942332642.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/kokivasivusujolexanajej.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/xasijobaxokefuwiko.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/vakowopobiru.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/tibelazaj.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/91242089862.pdfIn PDF document text
    • https://seikico.net/img-tym/files/42951818816.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/86848045348.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/77494726364.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bb5a84b9f---54435108965.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/kikafafinagawupafab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=qpsk+modulation+pdfPDF link annotation

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