Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d1bcaacaa18f8c…

MALICIOUS

PDF

47.6 KB Created: 2021-09-09 21:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2322e388e91632a0b8771abe922af0bb SHA-1: 11bb83a66bf394f046dfeb7947a6d05710772108 SHA-256: 67d1bcaacaa18f8cc07fa6b62807df2f160f038edc7abbb3c1fb0b87943a9c3e
154 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to lure users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8587

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://digivideos.net/ckfinder/userfiles/files/58568382543.pdf In PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/75436138766.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/3996338050.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326b6817081---46074155253.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/subugovibo.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16133002b3ac25---radofokowubutugukubi.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/10566564142.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/judixisuxerajuwevo.pdfIn PDF document text
    • https://robodom.si/files_vsebine/77021070795.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/2883343539.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/43438328071.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/835d37ba5a38e3bdac46f7f0e3c69449/melelotoromanesofifu.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/tagijupopufeso.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16132e0f369284---mopazelunagevulor.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1527919878.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613090cd8002b---31207043929.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/72417253982.pdfIn PDF document text
    • http://geotersrl.it/file/71743410386.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16135aeb95d208---golozegatur.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/4365605364.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/panizeriganojufadorukal.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/9677803747.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/16982128844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=stick+fighter+mod+apkPDF link annotation

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