Malicious PDF — malware analysis report

Static analysis result for SHA-256 355451c3194d488a…

MALICIOUS

PDF

63.5 KB Created: 2021-09-23 23:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 42d1736d5a72441e2e78686cb4491930 SHA-1: 60cbfcc26cecbf3b94666cc19b4da5940fd2585b SHA-256: 355451c3194d488a3f81b7db648971e9b034341d9765903acfccae3d77429381
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier indicate malicious intent, likely to exploit vulnerabilities or deliver further malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the suspicious nature of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6379

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://aristosaigonhotel.vn/uploads/files/munexubukogepozoto.pdf In PDF document text
    • https://handientu.vn/userfiles/file/wedizasirasugadokena.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/bijoxeronigabegatadakivoz.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/52443288390.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141507942aca---derazagigubudegutimonabi.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/24653776981.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/sezonomediputozimose.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/jowotufipizovipadosot.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/rupukixuv.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210910_082138.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/77807915542.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/vipat.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/runolumawu.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/jutimetilumibuwalesi.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/kugadepige.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/55130612652.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ee998b381---63626798545.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/44063981100.pdfIn PDF document text
    • http://compsult.net/userfiles/file/tenigafumepoxiwedako.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/82762474131.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/fibixusasinuwipaxegani.pdfIn PDF document text
    • https://csn-alliance.com/data/files/54781291093.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/60138914338.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/17474431802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=harry+potter+full+movie+episode+1PDF link annotation

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