Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e6b9f64525b46e…

MALICIOUS

PDF

177.4 KB Created: 2021-07-07 19:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d177256759eea8f86e697e7faf84cd7a SHA-1: 63d3db2a3a93c5104c9c27790da7c18fb34573a7 SHA-256: b6e6b9f64525b46e3bbb0ad5e803d2b4786b40dddf0edfe33303ce89b6ba2f98
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics identified the PDF as a link farm hosted on compromised or disposable domains, suggesting it's designed to redirect users to malicious content. The presence of multiple unknown URLs further supports this, pointing towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7885

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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892c5cb572b---78315771449.pdf In PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/ijcif5qhacoegqqh4qrlt5nri2/bofidi.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/notudebidopaf.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/reduboni.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/44a45d234df04b3cffbfda564cd5b93c/39310469626.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/pmvcgkv8gt1sldsmgi2irkf39u/21427450090.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/38630445533.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/gejafufujixamenosapipixo.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c92f9c3d5---fasipizubejexegolibilu.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/4477497565.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afbecd3b74---lajininisuzozas.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/69f0nhkpo848262hklhqakqdhi/67706016803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=god+has+appointed+a+dayPDF link annotation

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