Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd48c8f291d1c1e1…

MALICIOUS

PDF

88.6 KB Created: 2021-02-23 04:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f4992f232c5e41d138ab86e4f72377b9 SHA-1: f950bc9b1ed87d71c46b6379e969ab74515926be SHA-256: dd48c8f291d1c1e1d730aff1b9828b28ca85f118c7c69b0c79e8c446c4788e56
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. The document body, though heavily obfuscated, appears to be a lure related to academic search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9453

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/aws?utm_term=what+is+the+concept+and+principles+of+symbolic+interactionism PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453721/normal_601cf823ba404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_5fdc9231ef081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405639/normal_60029283cd086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_601a149989be7.pdfIn PDF document text
    • http://lasofetuxig.22web.org/afarin_sajedi_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_601cd2fb6d2f2.pdfIn PDF document text
    • http://lassituda.online/37486560961rhhwx.pdfIn PDF document text
    • http://sobibuxasegisun.rf.gd/free_online_bible_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/78423061126.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/notable_fonts_word_search_pro_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/sanobesilirepamax.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/7165267616.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/fofojolavowipevixo.pdfIn PDF document text
    • http://jodirebimufesa.epizy.com/free_tri_fold_brochure_template_ai.pdfIn PDF document text

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