Malicious PDF — malware analysis report

Static analysis result for SHA-256 539a5d7d614c371e…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 13:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ded4ea30a6b76e366962147d63d5805 SHA-1: 86729a636c20d5adfb51def466e0a72e572d8210 SHA-256: 539a5d7d614c371e0a0776aa1d01cf5357eb9aacb5625e3920a2c06628c9a7fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5895

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://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160c858f2e5b6c---1341372781.pdf
    • http://sntaviator.ru/ckfinder/userfiles/files/lefeta.pdf
    • https://contabil-fiscal.ro/mm/file/fofulejazepi.pdf
    • https://datawire.gr/files/files/rojapulagupuf.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/k9u4fq7i5vvhqk7fv5pfipfaa7/56573344369.pdf
    • http://fosterfreezesantarosa.com/uploads/files/60077398315.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b199188542---62969104482.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/r54ag4srhaeeeh8erpjjv85u7p/38003546792.pdf
    • http://netisiletisim.com/guvennet/resimlerfiles/raloxewulagugita.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c988bddd59d24e1249d11aa8de7cdb4e/48242224600.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607622efc0f49---42118189113.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/65f2281fb2072202128febc0e6239586/gamikowovojo.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/6sil7a9tnqi6rk0e6ib8qav9dt/80799475909.pdf
    • http://humanitool.ru/userfiles/file/3454917981.pdf
    • http://pogservice.ru/userfiles/file/99397205862.pdf
    • https://ou-ravda.com/ckfinder/userfiles/files/12816146484.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609294ee13497---wopitenonimasiwupanuk.pdf
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53130995029.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n6c5g9vhpktpl3fmv799vbqjj4/gejupux.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc0876c3d4---kewomapanam.pdf
    • http://startmatbaa.com/userfiles/file/26222292632.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e6087b6e7---99559188334.pdf
    • http://n2nnetworks.com/files/others/fepokazulewe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ielts+practise+test+pdf

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