Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff5eaf26ecc19c2…

MALICIOUS

PDF

55.4 KB Created: 2021-08-16 17:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2795c327f1d419e375aa1790052321a8 SHA-1: 6211638d35faf5c1c6afe9eed35e894cf04e2f6b SHA-256: dff5eaf26ecc19c26450bbd88e66b148c13e6cba35c9abace49e3b1e6c5fdb22
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised websites. The heuristics indicate a link farm designed to direct users to download files, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9066

Heuristics 6

  • 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.
  • 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 https://irlanc.ru/uplcv?utm_term=virtual+dj+free+download+for+windows+8+32+bit PDF link annotation
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/52d064289bdb160c5bbbe12cf2cb044f/pupavedejoguti.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/qqpast45uucbmdnqs93msq7tb3/ketezuf.pdfIn PDF document text
    • https://akemi.ro/hirek/file/39876174095.pdfIn PDF document text
    • http://katachizu.com/img/news/files/21477577336.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160eff353b3d5c---rodekize.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16083f39022624---50833205047.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160912b068abfc---76340416595.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/paxakazudabekukonajij.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/27214311262.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a7297d0377b2b144ab69642652c9f00f/goritibiv.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/e428i20nuiaim4a9bi0v0qal80/bowulefi.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/1rf5krsqfngk8ltoavrtte4131/jifagukugezujalopek.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4eb75d081f5ffe0295bf9de9a279e921/68795709557.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/90410783446.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/74497208003.pdfIn PDF document text
    • http://cristalensi.com/public/File/80430244317.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/2dc3268423973a8c32865746b1cab4be/tiwetapanewodenimixes.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/3d7863c8a0bcce80b0f1893824c110f3/madulexusunasa.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/zotaz.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfc8d65ac5---29263310229.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/fijixikifejofaxela.pdfIn PDF document text
    • https://wineart.online/userfiles/file/8133229221.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/36426712241.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/laruzewinuvifazazowifo.pdfIn PDF document text

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