Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ecfc0fe5305e9c…

MALICIOUS

PDF

51.2 KB Created: 2021-09-20 06:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02afe71c4513ed2816809e195ddbed13 SHA-1: 56c6f5fd202a9ef1ca9615de4590ef2bd33f2d87 SHA-256: 31ecfc0fe5305e9ccce35b081fde3c00a82ecee1552e317afa3a7d1864434c27
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6843

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 https://ceccarmehedinti.ro/userfiles/file/lesufiwuwetukurogulimivu.pdf In PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/67967751277.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/fosoxegakotafoxenugux.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/84075006937.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/14dae1e66c4270a7d1ee3e2959785340/92140280647.pdfIn PDF document text
    • http://becucci.it/userfiles/files/xazoradovevazuba.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/vezinodo.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/rolevinusebiwituxibenupo.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/86741008779.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/92210277090.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/93795787484.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/mamofezinoxez.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/32176494696.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/111dee31d93316c289e4d7c2409ed8ce/56955109072.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613abfff8f9ff---giwubeg.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/bubedovenuzuju.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c02ed38daa---43014897863.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/42286918298.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/ninowebobenoxevojulokuro.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/6689687709.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/47278794657.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/zogozoras.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=find+x+exponential+equationPDF link annotation

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