Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbffc4332c5277e0…

MALICIOUS

PDF

81.8 KB Created: 2021-09-07 15:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f5f2255b5cca108ee854327a80e9ad35 SHA-1: 6a332a2143e67dc490d81b2d164df27e85a95db7 SHA-256: bbffc4332c5277e0b6e795457389024e6c17249f277921224f73fc3f5bf95797
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing or malicious intent. The file's structure as a link farm indicates it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

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 https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/4e87092db65d6d16d50a17da984e7f6a/19422719715.pdf In PDF document text
    • http://studioaba.net/userfiles/files/50543510957.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/67934382274.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b7bc5fb2d---37918075503.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/50177035601.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/fikibut.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa34dc9dbe---jejutapawizepa.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/kovazilu.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/12076591688.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c536a63a483---67905224203.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/xixalekerebonozoxotene.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a587b38915d---46774927509.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/77184916573.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/57356398105.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092c88be4204---bazadirimexanu.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/tufadozowa.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/32288122134.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/jirowimeg.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/41206046040.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/28b9b7c10069b8eb997dcaff92f83be2/44707573058.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/46131354889.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/0emqq3a7uhh3uf3lsma9ro3vmr/23782784826.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210708_03AD3723D087BEA4.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/3s00rbca5glknimac1m7h03av8/48425021725.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae23d279c2---68552322892.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=phonetics+and+phonology+summary+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDF 19596 bytes
SHA-256: 416f5cc3ca21f75108730b10f0283b34a18b103f604d6908d97bffb6746277aa