Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e87c04ede516a7…

MALICIOUS

PDF

79.6 KB Created: 2021-07-31 06:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9759cb9d3a4bf082a70b8e581c68b163 SHA-1: 2ce112c13654f42bd3427c7a2a72ff2a4d64c571 SHA-256: 10e87c04ede516a7d1869b836b8d24c2d56ae3febca64353bd4998290c761b54
154 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9107

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://palcev.ru/userfiles/file/keruwetitizo.pdf In PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/bifamazamu.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1acd2290ed---savorekenugedokon.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8b5d58376---62850805639.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ee5f127e6---9808094947.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/6606557555.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ade775ac9e4---29278263797.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071c8ff1abaa---39555003700.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/bosiviwetidiropejebigave.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097b032905d4---dibotitorerogosugitadok.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080b2c7562ca---65211669460.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/32313254609.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/pawupababiwoledixivusup.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/rimopebivumixu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16104baab6dcdd---71922098656.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/leleranofuzavaxikulowaxu.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c77ebf5cb---vokepojebewofujop.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/54a530872297da8e88a23d6c479f061b/telejodeli.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/18635056277.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d0663bd4ebc42aca1f5d1ad94be4587/fisufeniroxasilufo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ev1767moqp0ed57ttk417p55ma/tajutasi.pdfIn PDF document text
    • http://mid-europe-ex.com/31991399410.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=kannukulla+nikkira+en+kadhaliye+female+hd+video+song+download+1080pPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001036b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036B 16924 bytes
SHA-256: 9e4643744874a84af2e064851331e8aa575e95d8673be5cfe7d42944ea69737f

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