Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef7c2963294f899…

MALICIOUS

PDF

65.4 KB Created: 2021-05-06 20:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df7fffe202c2bbba2aa4f8e7adce144f SHA-1: ca3c9f654049b07490a30cc8d5f427da5c0d9c3d SHA-256: 8ef7c2963294f899f0b8cf65478eac19859f688bf3c4277cff42666c3a685d44
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories, likely intended to redirect users to malicious content. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9578

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://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/1ccgcojbua7dosnib3bvterk03/97254830209.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160787fa587274---wuluwuxakaj.pdf
    • http://assushop.com/userfiles/assushop.com/file/suwetedavi.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/6iil63kcp2g62bn93uv9p361gl/guwosodutakosuwakezem.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079b7d63ad4c---63940296387.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/86970208885.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb3303927d---5368199860.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e727ba9d5c---wisov.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c4b354b73befe0d18966b428299431db/98514588642.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f367ab5119---46048834001.pdf
    • http://alexlunacoach.com/img/editor/file/45109012455.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607d94d72dcf5---tefevuzakiki.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6934641e9---kovexir.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16090698e38a44---77460929472.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/7eaac1a390c3eaa2ec00948d5499e6bb/gasepozaxuxivif.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fe4a55c40---54056780538.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=hammer+dauntless+guide

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