Malicious PDF — malware analysis report

Static analysis result for SHA-256 33496a9cbe29bcde…

MALICIOUS

PDF

78.1 KB Created: 2021-09-03 17:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6bb4d7beb3de99a4c03164c9296cd52 SHA-1: e4c08ba25d63b27454a05bd876f6620fc53c04eb SHA-256: 33496a9cbe29bcde178d975cd898e6a5a41678ff502c5d8c217110dac819f994
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple compromised hosts and disposable hosting services reinforces the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7437

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://evermoral.hk/upload/file/1626661406.pdf
    • https://patriciobanados.cl/upload/file/
    • http://status-go.net/gfx/userfiles/files/91723532960.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085673122d64---zuzesapuderakel.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7102aceb9---7446583512.pdf
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/55949714617.pdf
    • https://tecnibat.net/uploads/archivos/ditubavovifinoz.pdf
    • https://jjcfurnituremaker.com/userfiles/files/rubediwadokekemekuxop.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f6687f307a2---5403082177.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c419872889---zevuxoxawuwekosaw.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/8cd05015aa8257b4a038c4e986e95315/81596993737.pdf
    • http://debschoen.com/userfiles/file/1508255369.pdf
    • https://avukatwebsitesi.trakyasoft.com/upload/files/68952876446.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/30a7ad218987608445a0c629c708b452/rajuf.pdf
    • https://marigabung.com/contents/files/76257938530.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a312bc6dc4d---jibumipu.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce56af722c7---pukelugajegiw.pdf
    • http://www.hussco-steel.com/husscofiles/files/57073264000.pdf
    • http://hosungtour.com/FileData/ckfinder/files/20210712_14D9542970B8DC39.pdf
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210618015027.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/uv0trb4jcrds2co4lucklg2a6p/mafoxepuxarabaser.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=concepts+of+c+language+pdf

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