Malicious PDF — malware analysis report

Static analysis result for SHA-256 a178d6769a2f6013…

MALICIOUS

PDF

59.4 KB Created: 2021-09-05 21:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 04caa2cc39cc7c8a141abc74ebc98c6e SHA-1: 43ee1a47f49326842adac414a5e2de33e48713ca SHA-256: a178d6769a2f6013e9854713d54ba5c31be951636f869bccacae6960100abb42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple compromised WordPress sites, which in turn host other PDFs. This suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7684

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.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f8bd4e5a---pesebibek.pdf In PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/deqh3g4bq55odq1ijepoi9saj3/93577463520.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f194854832---gerojutegutivofutofak.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210625_191518_9746.pdfIn PDF document text
    • http://imi.vc/upload/files/kuribalojuk.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210810_192101.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b460230febe---33204040445.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/8376186152.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/32614323883.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/l987a37vs4f8q9ed73p0ptpjfa/dosafaresexotavatenagaj.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160984811b0f88---42844039026.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/53589314630.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd12dc4083---bukefuwudowexikorifefijet.pdfIn PDF document text
    • http://medrea.ru/upload/files/34644414837.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/21505019189.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/73a62817f3e86410e1b498defa389b69/lirimu.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/6b7b87vsqffguuasii8gdb47vn/96895575070.pdfIn PDF document text
    • https://vientangluc.com/upload/files/viruwatebugutax.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/1jih0bior6jmshliff2933agt3/68473538582.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/10236047504.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/22f64743429547177a594a6fc94cd023/37383600597.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/pelanojewumonado.pdfIn PDF document text
    • https://paperland.bg/uploads/file/tovopipadefamobibusasoza.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/99127029135.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/vebabizezasowun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=flame+photometry+principle+instrumentation+and+application+pdfPDF link annotation

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