Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f67468a7e8ea5e…

MALICIOUS

PDF

65.1 KB Created: 2021-09-02 10:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f3e89490e4b4bf9f5586d1ddc3733733 SHA-1: 1d7995d97498ab2a118a750408f7cd410284fc78 SHA-256: b4f67468a7e8ea5e6f8bdbd072a3c2bad3de67f6c1955d086775fd2ea60ab5ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted from this sample, but the overall structure and URL analysis point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8494

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://archism.ru/uplcv?utm_term=one+reason+song PDF link annotation
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/sipuli.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/rusofaru.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f48782aadf---gudiwupidiv.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/duwajuvipa.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/sopurutiro.pdfIn PDF document text
    • http://belloverde.net/emailer/file/45031976856.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610479a126eda---79056364299.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/67231471192.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab13bc4e81---tapuv.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/hj7dtuhibhuf6u3npif2lhg55a/kojarewovoporinaluxaz.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/vexivimomedesozufotokija.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/9671bfb6b23e24b3ff2a1a9e5b71c832/dosajediguwogazatenog.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/46711486333.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/guderojuliwu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607943814c9db---12553649955.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/56710049079.pdfIn PDF document text
    • http://fairview68.org/clients/c/ca/ca24e3df3ff7fa9b839de6c08aba9959/File/2297616452.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210814053812.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/wefegivabozajiwu.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/56590751846.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/vaxaruwugesowi.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/68577407534.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/sexaxawikuxus.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/668757de7044f8e96749268061e20f20/jejirane.pdfIn PDF document text

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