Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d4dcc57bee56f2…

MALICIOUS

PDF

62.3 KB Created: 2021-08-08 23:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ec8d6cea802e52a05fbba0b31ac44d70 SHA-1: bdd8da90d86e57fe9d6fd5090bd8cefb048ffcc9 SHA-256: d1d4dcc57bee56f2f3ed51ad886682698eacdf6f7f0473c56b6d5478145624b5
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5895

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://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd422b331a9---46798826263.pdf In PDF document text
    • http://seoulsquare.com/userfiles/file/kibilafafikemibedakabejen.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/usi56ngn5n418nek15c18vqh34/3292582213.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/semezozesisuxejekilati.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/252bdd1efc4c13d42068aee592363ca8/papovokejinoxizapiziter.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c03a989e2b4---xurexutapufegusob.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/busififef.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/kisakoxorewuwivetoxuwabo.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/b317aa9bccc4115ed611e27d8dce3906/fukojixivos.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/xalotawuxo.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/52813141311.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ff7c502e917aacd76ec74dbcf94c83ad/80558719078.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/22958225876.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096624d124d6---3880705430.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/kiwoxenafupumupelude.pdfIn PDF document text
    • https://togeltop.net/contents//files/64028918944.pdfIn PDF document text
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/22233515196.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f4a5cc8d8be---98400518327.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/boxefetelazajugawamoj.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/iokb3g5k39frvbgcbn0lruhire/37297232157.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16078632cd2e1c---dujizexukapumojiwekuruzi.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091b0261d178---zagosupibufozuxidunax.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/c0742ec7b1962464d404998b2473dfbf/sebexomes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=is+car+x+drift+racing+offlinePDF link annotation

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