Malicious PDF — malware analysis report

Static analysis result for SHA-256 6511cf49da55c822…

MALICIOUS

PDF

48.0 KB Created: 2021-09-25 23:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4b1a8712a000e3118cf8d861a28dde7a SHA-1: 9fc8780d1f210bb7514c4ab20ed883bd81945b47 SHA-256: 6511cf49da55c822fbdae4d91193a9d86988967ae671808eccdc5c47fdbd2745
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple external PDF files, many hosted on what appear to be compromised websites. The ClamAV detection and ML classifier indicate malicious intent, likely to distribute further malware or phishing content. No scripts were extracted, but the structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5549

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://wwpokebar.com/uploads/files/71356722950.pdf In PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/piruweteli.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/vizesoruwukalupanuvofu.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/neduxo.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af56c83845---xikilam.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/28674615493.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/dowarudaravatetuxetedew.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/kemoju.pdfIn PDF document text
    • https://smartbrand.ro/mm/file/kejejetuxebuzizizebed.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/81178054505.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/80122239441.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/33751996974.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/9657434190.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210912_107C5A9141E495C0.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a37ecda6b---natanusi.pdfIn PDF document text
    • http://zamgph.com/uploads/file/060238177787.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/e5632d5b9ed8611036e299094b59d3ab/72113993830.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/88087049827.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/deret.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/98773168580.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/tujodinigamejajosu.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109210222253216.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/75606060608.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/posalesotarufoxumojezudi.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/75155234841.pdfIn PDF document text
    • http://fgosvo.ru/files/files/79022081646.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/xupigetobiwadewer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=friday+night+funkin+mods+para+androidPDF link annotation

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