Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30fd28ff39db2e7…

MALICIOUS

PDF

61.4 KB Created: 2021-09-19 19:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 76f42e46fd91a5b185b58f00a34b6e68 SHA-1: 5cea2d1990de93f31051e0fc9f0934513577ac7a SHA-256: e30fd28ff39db2e73362192d470c322957ecd6f0fb93b67fac75d3d64e6f2084
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users to phishing sites. The presence of a link farm pointing to multiple distinct hosts, some of which appear to be compromised CMS uploads, further indicates a malicious intent to distribute or host malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports these findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6040

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://paneldeconsos.com/userfiles/file/nexewunonilajabetux.pdf In PDF document text
    • http://cecev.com/stockages/files/88915058310.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613610f7bdb04---35562763536.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/vukabu.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/97096073074.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3a6837de6---89448755966.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/kuxaxopura.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f10814a80e---59855434511.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/dd003a00d3f1d181192818c90b8bcfaf/80398738984.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e02827d88c---xafitamumapaxageresosop.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/51903581913.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/76403502261.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/melaguxamilevivagoniri.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/81593787545.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/58620006308.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/12761270244.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/78016488724.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/22945573655.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/5114487484.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-10/20210910122857680853.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/54810073649.pdfIn PDF document text
    • http://freetds.net/userfiles/file/36951078848.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210914072955.pdfIn PDF document text
    • http://i-dron.cz/data/file/62940315228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=best+games+on+play+store+to+play+with+friendsPDF link annotation

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