Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58c7bceb400bab8…

MALICIOUS

PDF

64.0 KB Created: 2021-09-01 13:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 065e0042e3eca96838ee0e955187b5d0 SHA-1: f9618d0f1169609647d524450e9985f522a7071a SHA-256: a58c7bceb400bab8bf9bb35dda2db3c251c24d85b43aa17870c8af2157d49c26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9601

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://coretry.ru/uplcv?utm_term=angles+in+a+triangle+worksheet+answers PDF link annotation
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070970f4c874---lokosotazemine.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/zilumuremobenisepawupepop.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/70377776760.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/bunetiz.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/fuxanadanogid.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c73d92623c5---fosidugalusolerevubij.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9627d20d1---punedajaxutumebadodisiri.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801c2a648b0---vujotiziwikadox.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161216df73f712---goxoref.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/2olhca6lgrnjcueu6aodmek3qo/12614159230.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/71469695960.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/zawokejuxi.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/21654892172.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/11610678471.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f085715699---sijazanabosatuwezuzape.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/41915324457.pdfIn PDF document text
    • http://modern-pro.ru/files/file/75062487516.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/lixofibufupimowenamipume.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/pivir.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b48a1512d0f---dasozutubuv.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/vatowojuvusuwel.pdfIn PDF document text
    • https://mmszke.hu/files/file/41119290244.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/94418220241.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/11610761635.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/fdf5b45a6ebbf00b9dc6711f016bc7bc/17450341130.pdfIn PDF document text

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