Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d4fda0885de4f9…

MALICIOUS

PDF

51.1 KB Created: 2021-09-11 19:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2067ccbcd3bd6b5e36a7a28cf0659a1f SHA-1: b6e79a7f5b27d50b0e7e1b2c8ac66e34715d7dc2 SHA-256: 09d4fda0885de4f9a772facb61ef65c97d7db13bdfdebe69b33cca98d7aa2693
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. The heuristic firings point to the document being a link farm hosted on compromised CMS uploads and disposable hosting, designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

Heuristics 5

  • 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.
  • 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://dom4m.lv/userfiles/files/53078938896.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/2g9qk40mu2cfqac4689jbo7mb3/retepijibudumebipefob.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/monolimeronoba.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/96fs7sgk4qbvcj32ll0ft4sjvq/faxafekafobunajanonolokew.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/12350263111.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/20836440688.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/visuvubudegi.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be19119183---62838934009.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/0fadde6f1185b04359b86207fb476da8/vugobosaduteget.pdfIn PDF document text
    • http://iscelenie.info/files/file/satosomazezegexidewakaw.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/91120542437.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/42715160094.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/rimaratikemikuvajabenu.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/kalagenugosivukagupuki.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/84156138996.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/dijesukib.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/torarovis.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/kejopidejagatowesedub.pdfIn PDF document text
    • http://zgic.ru/!upload/files/74879193983.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210906112730.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613264d0b8020---buviwetazafa.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/4967069363.pdfIn PDF document text
    • http://hig-hegmann.de/userfiles/file/bovulijojonuxur.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/6jj13o37s8hk7fo9168kpk1ifr/90285583640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=qr+code+scannen+samsung+galaxy+s4+miniPDF link annotation

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