Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb09046d5d12b26…

MALICIOUS

PDF

58.1 KB Created: 2021-09-17 03:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c1c7b608ad3f55dd3bad972fc34ef272 SHA-1: b7ea236dd067a2c12ed64a4fe6ae1df84a69f8fc SHA-256: 0cb09046d5d12b269b5cbe6b818b03411aeb33c4420e88ecab0707a42d12c31f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7215

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://smidgel.ru/uplcv?utm_term=how+to+use+your+phone+as+emulator+in+android+studio PDF link annotation
    • http://dralituncer.net/userfiles/file/30655729259.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/xidawuzosaxejigofiwozemi.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/11854615688.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/sibavotusegalukewetemu.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/71418634268.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/gunolidatewuralebu.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/xekazesedogojoruvikanoxo.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613433c95cf9a---18163317709.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/86083765793.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/suzurafepij.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/zasasuforewuxo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/sksp1mfmepsm9fc2m5idfatusu/1647684754.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/7b607011d2ff1ada814bedfd032788cc/32935933501.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/ligoxexejixepalizabevo.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/kopakufapevewivevediz.pdfIn PDF document text
    • https://fotografski-studio.kost.si/userfiles/file/13559446304.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/11041798854.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/48830729780.pdfIn PDF document text
    • http://kmsenior.org/file/files/lerano.pdfIn PDF document text

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