Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9f2d9e9a6deb72…

MALICIOUS

PDF

63.6 KB Created: 2021-07-08 09:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f7104f58311ae1bb05b526944742311e SHA-1: 2368e29bb540edb9c128f4b38027454d3397eafa SHA-256: 4f9f2d9e9a6deb72cd3fecc4ed6e776d4479298da1183ddcca43c30a9931a5d0
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. The primary goal appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6819

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://szentimresiklos.hu/upload/file/dofigatezijokakarusera.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac30e108937---kovagojuwitosifezujekanen.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0dfe93cab182ff1b38f249266c1db541/97008206753.pdfIn PDF document text
    • https://atl-50.com/files/file/7024400275.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2057562d46---peluruxuvewetedefodemo.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/zozowomijopuwajezo.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/65738814348.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/kufanidedugu.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/72924773514.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160787cc1ccf85---45896324214.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/8dc6f187d68a95e02e991fb371218c10/kekenajop.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/36442420121.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/5bc48a3e553f60f35e95c5fcb6a2f34b/tapazaxonupimojewozu.pdfIn PDF document text
    • https://bonacorsi.it/file/kunojusa.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/10bfae991bf5ce908f407da042b0b3f4/72244777009.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16097c6d1b747e---mixoxapotuvozabet.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/71238087410.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/bd2ee0eea76754dcb2c86d4bcf3e977f/48575225020.pdfIn PDF document text
    • http://erictex.com/ufiles/files/xalidudetenaraminib.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/28466087810.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800d77ee67a---67561143458.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///85347924031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=easy+beef+stroganoff+recipe+with+ground+beefPDF link annotation

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