Malicious PDF — malware analysis report

Static analysis result for SHA-256 411b1ca0876a4a6e…

MALICIOUS

PDF

77.5 KB Created: 2021-09-01 23:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0ccf460e58a2692fb27754ec09df7cb3 SHA-1: df67391e8f3cb03417fd05b99632bacd9f3a5f7e SHA-256: 411b1ca0876a4a6ed58d754a73988c3b653668872a9a2b695ccd04c8b643c852
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, with several hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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://hifitness.hu/userfiles/file/6321209571.pdf In PDF document text
    • https://chp-travel.ir/data/file/13577224245.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebaba595c3---90747264701.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/zoleduf.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/budigevekilugufizi.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/22d341a306b10c91651d1e9f28ee745c/78641061205.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/82806092337.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/95371756683.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/71463905101.pdfIn PDF document text
    • https://vientangluc.com/upload/files/bukezetadu.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/56504680813.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeab286cdc1---zekadifutagiwexomab.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/roroke.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/14423597048.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a999797e7ed---worowizomuvida.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e1703f3a6e---gadazoruwurokutuv.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/folodagupekumoloxisivu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mon1m17d2qka70qejnv60cdhj4/39324696239.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/75127116307.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/sek72ekegolqf9lmhp9gea4g42/16094854458.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/kanumop.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce297bca56---muwosi.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/f110a4444b3c3671c94f91613d6d0791/10661636342.pdfIn PDF document text
    • https://schmitz.cz/res/file/50610437918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=texas+write+source+skills+book+grade+12+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 17676 bytes
SHA-256: bf32ea9b6c1c3a74883d1ed0e964ef47e584233c59af49895ed348cc99529193

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