Malicious PDF — malware analysis report

Static analysis result for SHA-256 543a5ffa62c2f0c0…

MALICIOUS

PDF

65.0 KB Created: 2021-08-16 07:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 394bc2c176808134674f5d96b7a01e24 SHA-1: d2b1d2e66fc2186cc39ccc5bb1bc2acfa556d8ce SHA-256: 543a5ffa62c2f0c00a14ea2acee44de400e055e758c21b7cd9ae8610dc33fceb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/5dpn5cs3qds4rftbqe6fgr8go7/34615009410.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b965a59f33---jisifefinanikemebudutaj.pdf
    • http://wadsoda.com/UserFiles/File/tonuzegujovon.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f73e7c7e55e---30948469625.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/af206c7a497a8af42fcd42a7c130bed3/59099298365.pdf
    • http://nicenpos.com/userData/board/file/90484322557.pdf
    • https://doluhosting.com/calisma2/files/uploads/zewizimokifiwepoguwad.pdf
    • http://groupkaishan.com/d/files/jazurudofiwem.pdf
    • http://em-mould.com/ckfinder/userfiles/files/nutedilonutojebojowo.pdf
    • http://simsvizag.com/admin/uploadedfiles/file///94959543193.pdf
    • https://gymlesgeants.com/upload/editor/file/7664132358.pdf
    • http://hugslock.com/app/webroot/img/files/54514821053.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/07rtdt13999jqte0rlsc0onc36/57764103876.pdf
    • https://resonanceacteurs.nl/userfiles/file/luneburapiwedateguguji.pdf
    • https://ruedi-leuthold.com/userfiles/files/revilufufefezama.pdf
    • http://clinivetmadonnadirosa.eu/userfiles/files/bijedurelenekazuf.pdf
    • http://karimeh.com/public/userfiles/file/zinuzogibawavoder.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7f18c72733c86cc43d41650c31d11ec0/15685923920.pdf
    • http://constantcontinuity.com/membership/data//files/92645470810.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/d2a46fb86ef176c1974a9e42d111aea1/69096416749.pdf
    • https://asthasupermarket.com/userfiles/file/kejiredobizefezaboj.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161081b574c31a---53951450221.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b2e4d75b2---vaxepagagamemekimezifisu.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/a99f0293fe2135302d5fcbd8aa33309d/gidepizofupowudamatuz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=kelime+meali+kuran+elmal%C4%B1l%C4%B1+hamdi+yaz%C4%B1r+dinle

Open this report in the interactive analyzer, or submit your own file for analysis.