Malicious PDF — malware analysis report

Static analysis result for SHA-256 55aaa0b7fef1a48c…

MALICIOUS

PDF

58.1 KB Created: 2021-07-17 00:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c47d2485be0bf616cf4a1d8b8b7f22e9 SHA-1: 0ef02c9c7b45b73995ac68534a5d97035fcdc226 SHA-256: 55aaa0b7fef1a48c3182a3891d4e54d33c362db0ae0e16ee059163ca86e217c9
154 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and ML classifiers, and exhibits characteristics of a link farm. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

Heuristics 5

  • 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.
  • 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://medtek.vn/storage/file/85271577238.pdf In PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a19b6b8125---nariduliwifotepepikixuzu.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e0c96f2ad---wuvuvelesunifumizixejabu.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d18aae0287---94179145774.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e863c8e8---10516097862.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/34687b522263ec360a85c6c59e68f8b5/60559536831.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd95822b33---17421229843.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/78755c2398f61aab0680fea389a449ae/60559012877.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/cf976f756b4255841bd027f306969785/sokaso.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd2a3238d1---disepimowomapibaduguro.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/wijitebosovutod.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cda9d763805---23225234457.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070465b36df0---sisatinememixizaxinukix.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec0f4cc56---bolokod.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1202824cd6---finetoborisajitagiso.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2331aff71---16005446261.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c2ad2cc2---pilubojogurus.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/kekulunanuj.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/dazoporaveximopoxalem.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/6rlnmrten1d7lprln4ap1797u5/51639594114.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/kuxebukibug.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/2bd284dda9daad3ed1032b9757537730/80157899072.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/60528378110.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/795d846ccc4a999366296715f85b5963/doxitolorev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=acne+on+your+chinPDF link annotation

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