Malicious PDF — malware analysis report

Static analysis result for SHA-256 68313a0f251e87f7…

MALICIOUS

PDF

82.9 KB Created: 2021-09-02 12:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8553d3de8887f9bbd27eacc48a7100c5 SHA-1: f9d23cafe0d8080bee26015f7d7f151a520ef2b1 SHA-256: 68313a0f251e87f773ff94bd71c6ec127d4f6b2abcae5610aff64c650e72ca65
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, which is often used to execute malicious code or redirect users. The PDF also features a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to obscure the final destination of malicious links. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3829

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 http://gemculture.com/userfiles/file/3685093257.pdf In PDF document text
    • http://ausafe.net/images/art/files/gebevi.pdfIn PDF document text
    • http://fields-on-earth.com/wenojuzov.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/95074010874.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/33296014290.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a79da401286---64895929761.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/4219341904.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127f54d69703---gerosilumirabepazogofifon.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ece57d845---vawev.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36589d9ac3---17680000390.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085f6d762004---61278690078.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/fazumedazuxo.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161066e94c98b5---gurexowumobidamovuf.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609254a744666---netazojopamub.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/ohf1nc6r0ffjcq6jmr7q01f39q/18695823099.pdfIn PDF document text
    • http://vodova51-53.cz/files/9709769649.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/wewonogitirajidolab.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/bopirelezakake.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/fabag.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/71044046075.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/1129315209.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/93597389138.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/27404459894.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/6i3v83j1q2pafdcqm46qg8dap4/48699013984.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c927559764---98782453483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=programme+musculation+debutant+salle+pdfPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/bixadeligafuz.pdfIn PDF document text

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