Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbd4c79e128d388…

MALICIOUS

PDF

54.0 KB Created: 2021-09-02 17:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0c43060320cab231e72bdae6e718737c SHA-1: a27702301baa0540bfc6a9c32dbac00e960a7e9c SHA-256: ddbd4c79e128d3880265620ec737f08f70e6c765a5ff5f1fbeb121559c544674
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised or disposable hosting. These links likely serve to distribute further malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8263

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=sous+le+ciel+de+paris+piano+sheet+music+pdf PDF link annotation
    • http://dui-antidote.net/images/userfiles/file/nulukonebusavajalibukixe.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/53145180843.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1950bce287---86316943461.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/21320308647.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/nexivununinawafakuwulor.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/zamezelagisat.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/konagobenesezu.pdfIn PDF document text
    • https://kristinanamaste.eu/files/22678292761.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/kigaper.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/3bdne7s4heash2cjdmkffsdo02/xotedilaxuwenujavinuvi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/24991347526.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960b52ac7c7---pokuma.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/65047454925.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/5231058873a1037f255c9ae04416a493/58388944505.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/razasesaduvumupe.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160f30b533dc2e---pazawosumax.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/3ccee268a6627093c29ce3571369a814/85118977906.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/norolapefibuzejuwatax.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/57842138453.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/0sjfej2rpd657abkagq047bhp7/nesetonunozepumifedesida.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16094585a11cfe---salexatinoniwamemogo.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/o3cajtkirhkl6t9e4cmfi11mg6/66383259502.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/31821962827.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/31031786078.pdfIn PDF document text

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