Malicious PDF — malware analysis report

Static analysis result for SHA-256 181ba90ac2231259…

MALICIOUS

PDF

47.0 KB Created: 2021-09-03 13:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2e5b3e8ff875baa44e98505a0515fff4 SHA-1: 8d139848c11d37fb3cc929cd755dc955bf1ede8d SHA-256: 181ba90ac22312598b3b9463e01ef56c72d50ff9bbdef68fbe6a779508ae60bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 http://phatnang.com/media/ftp/file/jevokaranutojekamotus.pdf In PDF document text
    • https://davidfoleyinc.com/userfiles/file/91433880569.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/60d33464ba8c6583328b25d119690512/37021568790.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/22190760926.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/21f1ad5bca9ffcae72f8622fd54f62de/50664162640.pdfIn PDF document text
    • http://jpcadonate.com/clients/4/48/4863a0bac697dd4b44f4a1b1fb44835f/File/dedubixepawalomofojopumu.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210518121831_1183509866.pdfIn PDF document text
    • http://ournextfamilyreunion.com/clients/4/49/491fb30de6d8464ca6518fa43aba5bd5/File/45550071913.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/forafo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa641ee51a---72596345143.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/delutadaribu.pdfIn PDF document text
    • https://magatek.com/documents/file/60618103275.pdfIn PDF document text
    • https://ebooksweb.net/files/file/39402589376.pdfIn PDF document text
    • http://hongpakthai.com/ckfinder/userfiles/files/mafipaf.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/89709534979.pdfIn PDF document text
    • http://blsfamilyreunion.com/clients/1/11/11e20eb1c47c3498ff3e66fc1941d138/File/favuvobobotalubimime.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/jofekinodul.pdfIn PDF document text
    • https://educhina.mn/editor/files/83571351774.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086af4a9b2c9---70612844461.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/9289449088.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63e728c93a---27028120122.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/49961046074.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/cc9b8b6734611597d656afd450756bf4/68493938788.pdfIn PDF document text
    • http://thaide.org/userfiles/file/dopelugiwuzobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=quit+claim+deed+form+pdf+georgiaPDF link annotation

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