Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afcbecdc3bba321…

MALICIOUS

PDF

65.1 KB Created: 2021-09-08 08:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8e5664fc90bf9eb612a5edb6999e0ade SHA-1: da34cb77415966e8701910d609d0ff1b4026364b SHA-256: 1afcbecdc3bba321b51c00a7f6cdd74618a78676b004ad15437d9756d5e866dc
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The PDF also functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains, suggesting an attempt to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4667

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://predit.ru/admin/ckfinder/userfiles/files/50551987227.pdf In PDF document text
    • https://ost-fogging.com/upload/files/36538104727.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/6603631d9617b40aac41100f394188c0/46312885958.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/godov.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/88622162090.pdfIn PDF document text
    • http://dgn89reunion.com/clients/862287/File/reves.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/85993915647.pdfIn PDF document text
    • http://esteel.my/userfiles/file/nokepilefabepavisaj.pdfIn PDF document text
    • http://kap-group.com/ckfinder/userfiles/files/bowebidozup.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/282241208738.pdfIn PDF document text
    • http://contelex.it/userfiles/files/44313965644.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/gixod.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/xobirefovom.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202108280036102248.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a30a75955---27216646585.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f09af279f2e---jexujiwepisajirakuvu.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/61872097111.pdfIn PDF document text
    • https://anakaygame.com/calisma2/files/uploads/fezudujama.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51d49021b2---midewiwifedexomenibapusin.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/94274678514.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/sp1mo9l6i5cogi0hupgmd28dpr/45709591164.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/18856990727.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/46424568300.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021082514071686.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a153b2eadb---80283720791.pdfIn PDF document text
    • https://defaico.com/d/files/10487484135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=printable+blank+scattergories+answer+sheets+pdfPDF link annotation

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