Malicious PDF — malware analysis report

Static analysis result for SHA-256 e404d3366fd0e60d…

MALICIOUS

PDF

47.7 KB Created: 2021-09-15 18:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 805efa9885c52de18132b056f5e13488 SHA-1: c0935775247b0db793d79241087092bb1b6488b1 SHA-256: e404d3366fd0e60d393fa08e31724715658d28d22bed9c1e8b5c87289f1095fd
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

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://kechengchem.com/upload/files/38912063357.pdf In PDF document text
    • http://nigerseedindia.com/uploads/pezawodojepe.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/guzoxofivewiserapivisipak.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/39040867339.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/86468058554.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/sisesevoxujuxoterutinipa.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/xotesomefenivesolatedezaw.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/53082466216.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/74917474124.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/xeriwutiwur.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/20270496359.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/76799589944.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/12248220314.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/91433065125.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/lewopivipoge.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c83a0309e2---26881894886.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/fb8439a1738043dd6071cd98e8b4f59b/walulurilo.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/37730609593.pdfIn PDF document text
    • http://www.heksan.com.pl/file/bapap.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134675c3ee27---rozezuxupabag.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/kudowutifinotuko.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/nejolokitefujixamuge.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/relavumo.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/jitimagakuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=introduccion+a+la+contaduria+pdfPDF link annotation

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