Malicious PDF — malware analysis report

Static analysis result for SHA-256 2acd38dbd10f87b7…

MALICIOUS

PDF

126.3 KB Created: 2021-09-19 07:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d3c71980777a5c78249b80a59d6e09f3 SHA-1: 82bda37739d6730f16510f6e3aad32f29487c496 SHA-256: 2acd38dbd10f87b7f0ff681509884d8ad6b783e1d4f3104dc507f3af5e423052
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that lead to external sites, some hosted on compromised WordPress installations. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation tactic to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8746

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://synerhu.ru/uplcv?utm_term=romsmania+ocarina+of+time PDF link annotation
    • http://ibtaker.ps/userfiles/file/xebodajavilumalatoti.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161445739356e8---28700368587.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/93369436676.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/28528174045.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/61716ce2d2dab14619d9a9157c91e354/77683339640.pdfIn PDF document text
    • http://shesob.com/file/files/58172201661.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/86096386553.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/61981983846.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/69659732778.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141144727b32---mikaxizujaj.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/52658062752.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/93253976312.pdfIn PDF document text
    • https://khanikango.in/file/59833679781.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/34036954046.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/moziwebebukaduriligukus.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/tazifubenekunororisojixog.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/fomutenuwitemum.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/98763527393.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ac75c6a54---numarafoxuzunilaxuvulipi.pdfIn PDF document text
    • http://brlairport.com/images/file/tulame.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/54084186322.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/wununapaxi.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/9822798847.pdfIn PDF document text
    • http://topstec.com/d/files/xupemutuvadimona.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/njtkocq99g0dldtlse76uk5k11/36403564570.pdfIn PDF document text

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