Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ab3190d4aa37b9…

MALICIOUS

PDF

63.5 KB Created: 2021-02-28 06:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 41415a1bea85dc2131946d1b3a3eb207 SHA-1: d07a08c272e1e1c38f7036151925403a81095c75 SHA-256: a5ab3190d4aa37b99bba0ded9bef98db8f07916ab7c9f36567348714fee22f94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are numeric or slug-based, indicative of a link farm or SEO spam operation. The ClamAV detection and ML classifier also flag this PDF as malicious, likely due to its structure and embedded URIs. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8823

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=nfpa+1001+firefighter+2+certification PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493553/normal_5fdc57ac1f08e.pdfIn PDF document text
    • http://timelessdecorum.com/vebowumafipakuqf22m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_600a3b0e03e0c.pdfIn PDF document text
    • http://24goodstore.site/956312713271al6y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413117/normal_60070fc54831d.pdfIn PDF document text
    • http://eeuuurrrrr.space/brawl_stars_mod_apk_16._176ztrr0.pdfIn PDF document text
    • http://profer-opt.ru/what_are_rational_valueszb232.pdfIn PDF document text
    • https://rutejiredoratel.weebly.com/uploads/1/3/1/3/131383841/ec0a807d97ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_6030e408d3b00.pdfIn PDF document text
    • http://kalavar.xyz/91447123820v64xe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_5fd33ef7159da.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/81756904393.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/55030822545.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/52255093717.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/great_depression_causes_and_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/33872516185.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/bottlehead_crack_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/brighthouse_financial_form_10.pdfIn PDF document text

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