Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2262362a255040…

MALICIOUS

PDF

81.7 KB Created: 2021-09-04 19:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 086690447cb79436f69b2d7a9ee41f91 SHA-1: 9b0b5d112c6e5d5b2e600db017406421435f0a52 SHA-256: 3e2262362a2550402ed6c4b8bb13b127368cf1ac1ea3ab6dce50d043ce97d1a4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, but the presence of numerous external links and the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/13949923765.pdf In PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/rosozapibojerofojivelulox.pdfIn PDF document text
    • http://fotossc.pl/_files/file/kawunoxirepa.pdfIn PDF document text
    • http://lscapital.it/images/file/fotavig.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c433b9488d1a7cb427e63cd67349264c/zigezalutudovimuwetov.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/kurixilimuzofob.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/78045616207.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071435e32142---72100936543.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/6470774206.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5a04e6dea2098796560426010d1e99d1/potazinitusi.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/44239414872.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/gezikefolerapid.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/39778028098.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/38083848764.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3975c91d99ce085c59cd4ee4d7197b57/98394623058.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/icmbjtp8mrftjo14jc5ladi4e6/3415250271.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/161060da884731---34121298452.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/6282448264.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a899245df4c5a5a8c61faeac0d32e98f/rowonufutopimituvimil.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b95494400e---dubixorafuvuw.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/82904297057.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9290b7c21b8940ded04c677a351577ca/45148152000.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/nou6djcpr0u2hpo2mm9qdif2er/86560089166.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/mujanalizok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=bebidas+fermentadas+de+frutas+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BA 19104 bytes
SHA-256: 0e1049806747de90dfde8c7f951bd9e31615854564b96cc561b92569b653fc19
font_01_sfnt_off00010868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10868 10788 bytes
SHA-256: e96f14957ed4c05256fe05e798a5afed168492f55c482b8e311b309881ddd164
font_02_sfnt_off0001210e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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