Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a773bce2a21caab…

MALICIOUS

PDF

52.8 KB Created: 2021-05-16 14:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d0ab923a7cf0c42f2ab6ac8451d0fc2 SHA-1: 80fe3c8d0e34928608c232287a387e969c7922b5 SHA-256: 4a773bce2a21caab2790c7411889527a633f9fb6a8e0ee2040268458763ee220
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to host or redirect to malicious content. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6925

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://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/6af6446e11192fc3d16c6696139b939a/sezobu.pdf
    • http://bannails.com/fckeditor_userfiles/file/gefuf.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079a440b0cd3---70153720745.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3bd0606368ac42bd4709ea79e11fbb7d/5876694915.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a08acdeb234---38103938765.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8e8e7ac30---tubiruti.pdf
    • http://a-kamen.com/userfiles/file/52287279945.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/aa8bd147e0271fbcac918583b50cc4d3/98691053888.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210507083150.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/27i9lqo4msgmafht0pbv92bc5j/70088938379.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/jonunup.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/lejapakupixis.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160806ecf22bc1---11018840278.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a17288289b---xamurosazaweg.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160807d8050db2---tejukepogozebifeli.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=best+android+phone+backup+to+pc+software

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