Malicious PDF — malware analysis report

Static analysis result for SHA-256 856b5158d25a5431…

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 15:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3f0f139674b001a1b03afee74664f022 SHA-1: 1bb4c7cbd791ed50650eae376ba01d40ee75134f SHA-256: 856b5158d25a543189ead44c410b2cdc38a09e797efd149f238bcee258edec5b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and heuristic firings indicate this PDF is likely used for phishing or distributing further malicious content. The embedded URLs suggest an attempt to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3566

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 http://macautemple.com/userfiles/file/todovomatirilele.pdf In PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/92ggr73egqo9mfmncrma93aogg/favasora.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6lfk86vlkg3dq8c22mr376mklf/xewara.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/tejodokuzadakefugivok.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110785e2c509---zakinunubop.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/42785442351.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/22520192647.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/46108711007.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/xerasuno.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a305277247---ginubovebitunoja.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d783bc7c6---42223713529.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/gh67ud1i99llj4bj7geqd8n66r/pufugimabitowokazuzezek.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/36712994890.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/87092836516.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/sudigefomafuxagunab.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/jigudawaruwasu.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/pimusinevaxigoluxeta.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/55021145972.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16098855aae147---mefefok.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/h83ejm14fnre1pgg1gckdf8lk8/32165079038.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/15361134594.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e82fdb070c1f16609a5d1ef0fc9e931d/72101362776.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5d85b820237257bf2943b6492bf2e53a/6085681572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=negotiable+instruments+law+made+easy+pdfPDF link annotation

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