Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be210a79c419c31…

MALICIOUS

PDF

73.5 KB Created: 2021-08-12 16:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 49fc3ebbee17e8575fb88ba84b8551c1 SHA-1: 3a2532a36a02dfa5e731d68183ebfb77070c2961 SHA-256: 8be210a79c419c3121ed6a293d78701dc8f328a739bccfb5809fa12fc22d045f
154 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The PDF structure and embedded URLs suggest an attempt to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9843

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 http://toonesk.com/upload/89953724135.pdf In PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/siturozu.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/sutijemefokagog.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/madopurifibaxadiv.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a59872a2795---depida.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/newavixunetuvatagepeji.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/78189375710.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/navujisotubi.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ced4925ac7---kubifotogasin.pdfIn PDF document text
    • https://drsaman.com/files/30342931144.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/laaahrsf04io3cso183rtf0n75/zezizozefuz.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/xenobukivixilusadakoxu.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fde0917fd6---labuve.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3252_20210626105306.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee0ba098a---88903268428.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e377764f47c---baxuvizotovipakexasazur.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/xafibufalep.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606f762f8f59c---6490402824.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/wobulikifemo.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/14e5240e92cda7409c071faac6590454/52141542437.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/17224132362.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/8b1d9793343fda1c30e13a34a1481af5/25875017209.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb952271328---5984828669.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/rfgabrs1reat576nakl4kmothn/duped.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=cat+5+cable+pdfPDF link annotation

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