Malicious PDF — malware analysis report

Static analysis result for SHA-256 605e20a82108566c…

MALICIOUS

PDF

63.8 KB Created: 2021-07-30 14:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: b150e0a0d962169184b78cdeeb4db960 SHA-1: d2597a5310835a73a4e0ec3eb8e0f683ff039105 SHA-256: 605e20a82108566c303080b736533c2d7011a9f9936e7fc2736076088a8470d0
154 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous URLs that point to other PDF documents hosted on various websites. The presence of compromised CMS upload links and a high ML classifier score indicate a malicious intent, likely to lure users into downloading further malicious content or engaging in phishing activities. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6239

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://hophungvietnam.com/app/webroot/uploads/files/zedavozikuvetavedoxuwoguk.pdf In PDF document text
    • http://z500.si/files/19076103528.pdfIn PDF document text
    • http://bucketdiaries.com/uploads/files/guzosazedodak.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160895adfaa028---66019490129.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/72928116110.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c9f2cc191---wilowivafagasuvudos.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/d0697ddc9b115f20f9d94ac68f5f34dc/bazur.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/zomefegebosadazu.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a2fb22442b184d8b5b0677e31bea69e4/61611165985.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cabfe0b96f3---budibiwixap.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/fikositotusitaro.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607177c21a9a7---24076861970.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/64346303403.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b41fb52c29---fomirixexixugozasimenob.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/63tn8f3aogmqo19tpghju3pfjs/kafunikegarenabiretumunu.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/15176096841.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/68264536122.pdfIn PDF document text
    • https://iword.de/userfiles/file/91995579262.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h0ao717v3atjs4vaetpmohudij/xupiribikijizuw.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/vugogumurixoj.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210718_F104917BB6D0F012.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bec55a4d6---bemenijag.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608278e3d41c8---pakalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+5+mobile+apk+no+verificationPDF link annotation

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