Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5c21430af6c7aa…

MALICIOUS

PDF

64.0 KB Created: 2021-09-03 02:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c020bc2bb0f34e32175c75b1835f4889 SHA-1: 7de26d72aef73f8a9ea7087c4d53c5f61efd68e9 SHA-256: 1d5c21430af6c7aa56d8c06846119324b2fa122e8409d7af30b47922c83a9ba7
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, indicating it likely serves as a phishing or malware distribution vector. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS uploads. The presence of these links suggests an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2157a718501c573b7c246f04d1fb1f32/25561069362.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb1309c199---kiwoguxetikenebizobefu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d59c2f9a40c---32642547584.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/s2kj5mhua6lmgdka9hp6hguh6s/20411037548.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/0fc7050fb3ca7125b698362a6632f147/fejume.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609896b5d5617---dakowonugalejizufuzavej.pdf
    • https://vildmarksjagt.dk/userfiles/file/peletexibuz.pdf
    • http://ms-beauty.com/ckfinder/userfiles/files/buwonotetomafoxofa.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/ad687dbc1463cfee31d621c1d4bd9f0a/rugokep.pdf
    • http://csptech.net/admin/userfiles/file/rolisinozonomibisekedijis.pdf
    • https://genegurumiraclehealer.com/userfiles/file/47417711826.pdf
    • http://solamsys.com/userData/board/file/pazip.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c72e7923782---bimovuduzi.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160af577503005---nunusumugapumapusozuka.pdf
    • http://96rangjai.com/userfiles/file/gepovaxobafojowamozal.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/r45r58op8gd90gl3kadsadus09/zawaga.pdf
    • http://upoart.com/ckfinder/userfiles/files/lapivodebiliredoj.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160deb932b85b5---78718987194.pdf
    • http://wych123.com/upload/files/56595282179.pdf
    • https://svingenieria.cl/userfiles/file/wijiwesog.pdf
    • http://gps-tw.com/CKEdit/upload/files/29831143694.pdf
    • http://prochem.vn/images/uploads/files/71846046892.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=cours+sur+la+classe+grammaticale+des+mots+pdf

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