Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46cb93704895a52…

MALICIOUS

PDF

109.7 KB Created: 2021-08-15 20:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2fb2158e94a15acdc9777375dd6e7b4a SHA-1: 8193efe981438adf6ad5a1b93fd0075f2a02a339 SHA-256: c46cb93704895a529a35ea8c99153ef9aa20bb68192a680f630c537c92fb36d8
154 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. These links likely lead to phishing pages or malware downloads, indicating a malicious intent to deceive or infect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7925

Heuristics 5

  • 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.
  • 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://garglob.ru/uplcv?utm_term=compromisso+radicular+bilateral+l5-s3 PDF link annotation
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/943592ccfb2a0872202a1d66f9dcaa20/22428805172.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/xazigogurejujufiniwesobu.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-22/20210522193339200108.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/fgnpmm2pq5pa7db3uq2l87gn37/54226811589.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/10693447595.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ose3phgu5jvpl2o3l5p3l6f9pl/vuradagasuxita.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/venatasatibomavejux.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a1765e4711aaa7359bc26742ac0bea97/96879559678.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae95977102a---58598827662.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/4277440126.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/zanubuzumunoxanaribis.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/46113522948.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/zusexoxurofoniw.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/93914849185.pdfIn PDF document text
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/vetinomeguwob.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/37899360106.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/mabatokojejudezi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7bd55f1fa---5925956928.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/51f31a16974f0bbe9f3f758a6a49ba0d/nazawilop.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/d4cf3edd8a81dba42bc718d9fd088126/famavuvufatadizo.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/46635407923.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ed1b25bbaf8---27925770289.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/nadafasajew.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/39c543b90ae995bd1cf8015d66e7c3f3/rekiwanujagugibab.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ba3de70a0---jerategopak.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/31262951287.pdfIn PDF document text

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