Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82595018734a973…

MALICIOUS

PDF

63.7 KB Created: 2021-05-06 14:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 493f01c6c91ec01e3278e62d8a571033 SHA-1: 4a8a627d856ed8d9141bb7f91987d9e83a9f30f4 SHA-256: a82595018734a9733eadd001305255d847df57e401ea9c63ded3bd4f0836f54b
154 Risk Score

Malware Insights

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

The PDF contains multiple links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The embedded text "Bcrypt. dll windows 7" indicates a lure to attract users searching for specific technical information, likely leading to phishing or malware downloads. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7290

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://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/7ba1326fb4a4a71b3e2c63ca25ecae59/55054623720.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093b51802652---xegaro.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/qnc5atbncp3uqhmn3m04j76et1/meroxaneguwitewokekas.pdf
    • http://dioceseofniranam.org/userfiles/file/59521145206.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606d84fa25c6e---77804766305.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b9f41fa7cbda55382783398ccc8bb71d/gupobufisawasibikotoma.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160861cb47963c---49904626666.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffe83f2c7f---73006080945.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/e7700840e28ecc9353e66ef9981a33fd/fumikasoleguro.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff7361a676---lejaximepe.pdf
    • http://afghansolar.com/userfiles/file/2087422053.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b80897cef41a077036086ed9792a883d/96535425700.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/uee8os4fnru8kliffhb3jlf8l6/1893732390.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/vn6jadkhruajnklvcfdr6dpha5/samevugudujomide.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=bcrypt.+dll++windows+7