Malicious PDF — malware analysis report

Static analysis result for SHA-256 af59d35df1d55c79…

MALICIOUS

PDF

91.5 KB Created: 2021-06-19 15:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b2c20936a63aa2a97e54260f06fd7e2b SHA-1: 3f9dce11c43a30f4da011a40819898702bc1a499 SHA-256: af59d35df1d55c794db98a05aca0c1fef3c4795a6a5689a037649d5a85e7d6d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

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://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/11526afc6449d40a7c44c17eb6866944/59530015919.pdf In PDF document text
    • http://brenna-ski.pl/userfiles/file/400254238.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5fa919db1---matuvopemo.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/1291401ec7ed868b40c6ec1cbe7936bf/52396920265.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/38764792959.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609698074f8c9---82328201574.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/22295974200.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/61448702576.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/39981662453.pdfIn PDF document text
    • https://manenshop.com/upload/files/77345569805.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160751d6f53038---47331427524.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecba2c0afe---35245694230.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/lurisi.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb0f91e662---nopazogore.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/36965571787.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/83dbadf78328c3668b5e2a1c223b456d/litedemodi.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/b4d3f752f0355ac4f187cIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mudakathan+dosai+recipe+in+tamilPDF link annotation

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