Malicious PDF — malware analysis report

Static analysis result for SHA-256 091520983cee13a2…

MALICIOUS

PDF

46.8 KB Created: 2021-09-05 03:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: adb3456dffd0f54445b61bbd8f1f343f SHA-1: 5f740e1cf6614711a4251f82f1f77121a6f664c7 SHA-256: 091520983cee13a265579a8b0dc4adf170465a2c69c3372b7361f11812092fa5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for distributing phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and heuristic firings suggest it functions as a link farm designed to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7035

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://maekuangudomthara.com/ckfinder/userfiles/files/ruxigulobufujab.pdf In PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089909c88bd6---26795549236.pdfIn PDF document text
    • http://surausa.com/uploads/files/67890530602.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/r9ghq76g3c66sr8tlnmrtgh9p4/rozizawa.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/44254274783.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/xegokevobat.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/wuwob.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/ehj9f6ubiqea5ku084k0t5hp24/18157794664.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/d1a6e547adb1f8e84be518dd41d72c53/fewapu.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/dovokivozanogowonixumula.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/4296895302da14e5a395915b78ac3ce3/72507269574.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/mevuperuwoxe.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/451361259.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/29b2ac4e3855204de08ebfeee3729458/25596034139.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c288140356e---rugorobejusijifawililebek.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1d46c9946a343dfc59742f0492ab499e/60492868551.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/womevupe.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/53080273339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=biological+science+2nd+canadian+edition+pdf+download+freePDF link annotation

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