Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec8028d1e302daf…

MALICIOUS

PDF

55.7 KB Created: 2021-08-15 02:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e47783890809c3f38c038700dfedbd4a SHA-1: de6ef3a2a122620fec0c90c2414813428b555e57 SHA-256: 4ec8028d1e302dafb355babff2ab69f6e3d780421876f0a211514c14ecc21acb
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, several of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The primary attack pattern involves directing users to external URLs, some hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/hi6alnkc0ph7nmfat678m9nj9c/tipiboxenorasavegafesi.pdf In PDF document text
    • http://homeopathyhongkong.org/files/77690504498.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160708fc6df1b8---6335560109.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/tudugefumimezizus.pdfIn PDF document text
    • https://masukpt2.com/contents//files/vilitivakezumutuxepawap.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/xusulasun.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161066ca27ee23---92469517502.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/5cbb9bc6e27b1f97c7a63ed92ece587d/mebokogit.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939ff6b91ec---bofeg.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/58d9a1b40c53c25a53846c0fa6fb8039/jozigogazoxogafefipumege.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/lurajidedetufexigukulow.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/sonawikozifag.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/nazux.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/79899446519.pdfIn PDF document text
    • http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/18429473530.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/65411216449.pdfIn PDF document text
    • https://harvestrain.com/wp-content/plugins/super-forms/uploads/php/files/35db359269b6ec0061f527faf12c7650/37312744013.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/22966966174.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/8404c9f9e336c5f14164661165d3efef/6582510463.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/nijuvuxipatim.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/gubikepefifigibezejara.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/po1d63pajc5l3bmnahkei759i2/46323091908.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/kituvexufeIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=organic+chemistry+12th+edition+solutions+manualPDF link annotation

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