Malicious PDF — malware analysis report

Static analysis result for SHA-256 997bf3a34824739f…

MALICIOUS

PDF

112.1 KB Created: 2021-09-04 06:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4a05d3abeaa3ddb35b6fa9193dfd2789 SHA-1: 99d0ca6ed1d8c98a047f93ff92af7d5bf19fb709 SHA-256: 997bf3a34824739fc8bc835f476fa884f21c0346b2ae20449edbb6fde66fb052
124 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3929

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://crysiq.ru/uplcv?utm_term=yamaha+psr+2100+keyboard+manual PDF link annotation
    • http://agro-partner.com/Image/files/75711257060.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-17/20210717102308625652.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160b78072ed597---26522468766.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/d2ur7otolugu62hqfmjcm7s4al/17787982051.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/10881058548.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/86349540283.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/61749215641.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b2c0f14f59---218870434.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/6318cfc0f123166462865bbbee35d20a/52627763369.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/pupepujopuwupa.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/xapexonolegajudefonegivu.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/dafezodafuliwilefaxudo.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/95181488961.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/sodofepapivujatote.pdfIn PDF document text
    • https://ikima.fr/uploads/file/55379481141.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1715e4af---gaxanel.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a837d8c7a3e---46797924481.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/44984216494.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/80732197351.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8656009d8---48266578813.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/fabajemo.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210903200432.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/bcf606492555952728a8ec835b4deafe/69698346103.pdfIn PDF document text

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