Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f33c02f8c5cef03…

MALICIOUS

PDF

61.1 KB Created: 2021-06-23 07:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6fc0fd6c70ea20aad410c7a1ca3791ad SHA-1: 5152110b4a5b2bd997814c1c99fb9b4aca7a1818 SHA-256: 9f33c02f8c5cef038f4ba922fce7cdde9dfed8d8a9074c4cff4324c7750be9ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9545

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://catamma.ru/uplcv?utm_term=cbse+class+11+physics+laws+of+motion+notes PDF link annotation
    • http://acpiindia.com/userfiles/file/pufew.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/4b0b97ad7e7ebb019fc84b2fb9a9a482/93318598342.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/68079452152.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/66018748272.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/dojojudaxijitemovawuxokuz.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16079ad0d75a1e---pilogekodusapotaw.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/zafiladuvixumufif.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/23105827762.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/c8t8lp7ggo7vc8j93l7u31l11l/83445173325.pdfIn PDF document text
    • https://beaszemin.com/files/modad.pdfIn PDF document text
    • https://activepymes.com/pub/file/xeruraga.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bbb328954---40540365478.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/fezeluj.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/h2s37dca25qr8r9giuhr67obs7/pizojinu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb155d1e38---97328772094.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/54335389860.pdfIn PDF document text

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