Malicious PDF — malware analysis report

Static analysis result for SHA-256 205e2f5db0bf9aed…

MALICIOUS

PDF

54.7 KB Created: 2021-06-20 23:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff8b53443669cb10a6b0dd5d0b3b6fd6 SHA-1: 37bd7b662dc323844f1656acc6026b84eb1492b4 SHA-256: 205e2f5db0bf9aedce71d023ba1c520af71966b75fb2482ab77f3ef30a78b596
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of embedded URLs and the overall structure of the PDF point towards a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8426

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 http://nacyc.jp/Upload/file/81431768514.pdf
    • http://cn-polylysine.com/d/files/48684293172.pdf
    • http://ats-dz.com/userfiles/file/pafeworafaxomoso.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/14lmprtfaq279jk6f2ft464537/xedazagasixomisiseg.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4fe791e7cb49500f90ece830432182e0/xapuri.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d89e5388e1---83302420766.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099cf2789b87---58439940257.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079efc13692b---18293726073.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c94b9776ed1---38178200870.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3ab826be---72571054435.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf79a615fb---dabuvimodugudusoxan.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/dtr8ok656srk6c2c8409e9p9mu/26868937986.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/n3fmpmq9suprqmkcql9gc4mh0i/42848894599.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086c7e5ccd58---57857145204.pdf
    • https://szallas-karpatalja.com/upload/10011146238.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=algebra+2+arithmetic+sequences+worksheet+answers

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