Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a12030ead39e44…

MALICIOUS

PDF

57.2 KB Created: 2021-09-08 20:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e1dfd220e2828988a4ccc698aa65b6a1 SHA-1: e8abb1c536b6e365bf2a87399e9e05714f981dad SHA-256: e6a12030ead39e44b98db51ef71f168cd60d93b8a301b98108bf917fbc958e80
132 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. The PDF also contains a large number of external links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4489

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/b008b59199b57e86fe8b85a3f9e468d0/21347990074.pdf In PDF document text
    • http://www.binghan.my/userfiles/file/91946351578.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/f70d945ad209644090e6bdf71c865eb3/14367245055.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135995eef560---5606883262.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/84965219064.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/30321505213.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/21890355823.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210904201230581690uzeu96vn6eba.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/50835625441.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/menodewimuzapibid.pdfIn PDF document text
    • http://ozkayalarlojistik.com/userfiles/file/15094635596.pdfIn PDF document text
    • https://atrax.hr/files/zuxid.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/vufafakivonupujitovi.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/nukujefemevelufiziz.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/18290309976.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/kanobifak.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302fb1b5a0e---56242901322.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/50704642350.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132f7c4d12ba---wazatewomoxavawifabobu.pdfIn PDF document text
    • http://podarox.ru/public/files/9048399032.pdfIn PDF document text
    • https://adium.ru/userfiles/file/vepiwekawojowudaxafef.pdfIn PDF document text
    • http://leruichem.com/upload/files/gokogaremirejupunuxerum.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/20308776417.pdfIn PDF document text
    • https://x-software.cz/data/file/wodoxerifoxinizepujize.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/78382153370.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=thumbelina+book+pdfPDF link annotation
    • https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/mipubakexutiz.pdfIn PDF document text

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