Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5cfaae9975a59b…

MALICIOUS

PDF

46.9 KB Created: 2021-10-02 17:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 7a6ed112aae952d4c7401a6daf9f9515 SHA-1: 269d66d82563c89a6486d236de64f87db31267f4 SHA-256: ab5cfaae9975a59bb59043e49f32c6d5494010bba82423f6e54409425da529b9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple compromised websites, suggesting an attempt to obscure the final destination and evade detection. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6520

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://inwebjor.ru/uplcv?utm_term=old+etiquette+rules PDF link annotation
    • http://nt-module.ru/ckfinder/userfiles/files/81295946278.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/20cee958ce1f6650e9b83f17a46c7959/ledavotixuvajulutoden.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/dizigetik.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4d50cb8e1---90632356895.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/bulepabimuvufewapepivovux.pdfIn PDF document text
    • http://newcityhk.com/userfiles/fawinojapuruwurolu.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/99597580279.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f73a345faa---zugidibubokibosopenidadur.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/pozavalojajiw.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/49403236922.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/46249116812.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/sovajebatu.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/gonazurigudigidutofeb.pdfIn PDF document text
    • http://cpils.com/userfiles/file/94159481748.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/ruwamanosali.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4f5bec58b---nutafexetasuvupukidat.pdfIn PDF document text
    • https://www.ocnistudio.cz/ckfinder/userfiles/files/pujat.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/simifibisebi.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/4873564598.pdfIn PDF document text
    • http://webbuilders.com/files/file/bosuzotava.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/88063744990.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/22872382715.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/zetadonifesuzomigel.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/jogufakedu.pdfIn PDF document text
    • https://activepymes.com/pub/file/74472497154.pdfIn PDF document text

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