Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a10e144b021b51…

MALICIOUS

PDF

63.6 KB Created: 2021-09-23 00:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2bae25e1c0899fc4c4dc14a24c0f52bc SHA-1: eede772713733ffe5d892650888ab0d82d315051 SHA-256: 78a10e144b021b51a292ecee1a7447524901f2cc60c96a052eeb3cb5d04dc582
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8306

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 https://coretry.ru/uplcv?utm_term=fake+gps+tanpa+mock+location PDF link annotation
    • http://horvathortho.hu/tmp/siwatakuj.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/85916129080.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///xipupetumezagekigidinelul.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/lifunisipoliporovokesuduk.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161405a6bbb8e7---31709277286.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13890602032.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/25327052729.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/63562171826.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/dorewebafotemopifotujow.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/14421417953.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/dojubotekedemikime.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/9844361022.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/jisomibusupulorimapeb.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/36437887676.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/vapowumebozatisizevuxu.pdfIn PDF document text

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