Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d09445762803c5c…

MALICIOUS

PDF

42.7 KB Created: 2021-10-03 05:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bf0964082242ad0a4e44c3e42a9f60e9 SHA-1: 9abcf9ceb43968730b9e0e30472a6d3e5936d6e6 SHA-256: 5d09445762803c5cdea9ba31254f2603052d1bf27598678c8db7f37b7716794c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to numerous external URLs, many hosted on potentially compromised or disposable domains, suggesting an attempt to obscure the final malicious destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7297

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=educational+technology+in+the+philippines+pdf PDF link annotation
    • https://trsoftyazilim.com/genelresimler/file/dejexemedi.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/fixeberutokalebud.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/83559401078.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/30109718929.pdfIn PDF document text
    • http://thietbidienmpe.net/upload/files/jenuxosegole.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/tudemamezozedugatugo.pdfIn PDF document text
    • http://1111.morefriendship.com/upload/files/fedeniga.pdfIn PDF document text
    • http://gurgaontaxi.com/pa/trainstation/uploads/image/file/5519813178.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/2694513530.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/31662300462.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/70898138528.pdfIn PDF document text
    • https://avukatwebsitesi.cicasoft.com/upload/files/sunurokimozefutosalogexu.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/busifipuv.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/49122095583.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/sumenudizikowuzesidazoga.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/1894477448.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16140237d80c8f---fetofew.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/sesisufuluzabafoge.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161477fc0b4a97---buxib.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144bb70b10e8---jepivuru.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/7cb1064cc9d870840ac17a479c1d0c18/xuvebaza.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/40228485269.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/71697102200.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/tuxotinosujipizogasufowu.pdfIn PDF document text

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