Malicious PDF — malware analysis report

Static analysis result for SHA-256 56bcb7fdfb8d8282…

MALICIOUS

PDF

62.3 KB Created: 2021-09-06 13:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c788444ddcd742ae47cabefc9d63c792 SHA-1: 4e5ab1e8627b94117c8f991a9509fd0eb0ac8fcb SHA-256: 56bcb7fdfb8d828292fb4b98f9346e6bdb924d8e55764d4540f03d7ab01ebcb5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5168

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://coretry.ru/uplcv?utm_term=industrial+waste+treatment+pdf PDF link annotation
    • http://zlhk.ru/upload_picture/file/53071224059.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612cc8c348015---3478371281.pdfIn PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/57192175744.pdfIn PDF document text
    • http://redactron.com/userfiles/file/ligojikipixowature.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/6g1iul9tfrnuh53aqpf5mannu9/rojipolukixaguduzasodar.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fb99b5c11---88867866043.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/63495210326.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f17baa1779---gepejogifukelefekile.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/6032135.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/43277816058.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021080703311074.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210624195221148.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210812_7838B79C244B0F6C.pdfIn PDF document text
    • https://mmszke.hu/files/file/zezejipo.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/lujez.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dc4a7e8f80---vozobafebowulax.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/zabebu.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/70b2afe7efb71e6f9c01f5ea3cee3f7e/pomudugalodobude.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/32865893187.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/56179414421.pdfIn PDF document text
    • http://grandfiltr.com/files/file/xusanexazoni.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/lofifonudogujezixi.pdfIn PDF document text
    • http://tauzetaques.com/clients/1/1b/1b95303171b4519794d6fee637ef680e/File/61211827814.pdfIn PDF document text

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