Malicious PDF — malware analysis report

Static analysis result for SHA-256 964b4f0cfcec6aaa…

MALICIOUS

PDF

63.6 KB Created: 2021-09-01 02:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5f9e78eb9bb5e2995802d9ba97333368 SHA-1: 94a47f8363f53cce9f6a37dfd5b95c46c188998b SHA-256: 964b4f0cfcec6aaaeca7d5e056b60c7a8ed9d64831657ef54b5c535ec50be73d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution lure. The file contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

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://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/94133281383.pdf In PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9e9ced79---lixalugepixivat.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd449898e4---44412072819.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///kipitasegawenefofijadexa.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073a5b39ab75---kekupufijolaw.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/40728614183.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/elgqvfuhih04hoauu74ubpfsj4/faranekazilerezumo.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/44497144273.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/74981474122.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160916ffc2f482---15554665625.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160736f1e85f14---wixapifevapa.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed5c17b708---zesuvukeke.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/xobofuwux.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/texunuga.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/18700550721.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/ririxekagizivojuzesik.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd05f10d45---botiguzive.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608401213b0f8---dokazeg.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3cqk9mlts1chc58r8hlj3887o0/62893751002.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be701be3da6---76935831312.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/nokuga.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/mekozelo.pdfIn PDF document text
    • http://ymmicro.com/files/files/6077169590.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/dukiturobopogiwudese.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608963771cd68---pijavimivapijowobili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=is+it+safe+to+swim+in+high+ph+poolPDF link annotation

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