Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f2545e2dd22d30…

MALICIOUS

PDF

73.7 KB Created: 2021-06-30 10:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4b5df40a67aba96d5de8f63118427ef3 SHA-1: 3add85f4f985f311170ea854a5395313790eb8e7 SHA-256: c3f2545e2dd22d303a21bd7572b8777883d5557f3e0924d139b6cf63f54ff27a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary attack pattern involves directing users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://soudurelauziere.com/upload/editor/file/kojukuxeburetifeleve.pdf In PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/ketenap.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/bd2a6a2a98d4151b1c8440cfd80a0d75/88077322722.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8c36e5cb2---gajumefasukagobe.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/deromeluzigafapefibifufu.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/zupira.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/13772723199.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/17100939723.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1c9539e7---85868158618.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf1536d520---28636867170.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/n8c9kujsie06bq2gr64a9np14g/dotosidaketoteretut.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/fejawimavenopamakofo.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e1543c724e665530d554eb31e7f0ee25/75733774707.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdb4c59cb4---falazonipavidugawine.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/24623250086.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/c9d6efjkoh4bavv50j6m6j8rdq/gatijegoxogegagabazaju.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab37ae1104e---8438008899.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210615_46CE075BCBB25F6B.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/38465515847.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080e72a0ea29---piwosakeraxite.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff8e992a58---82590314408.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160da2fb0e1c10---49995441307.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/xuxebivatonexone.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/jazakedulikekajoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=tick+tock+nakedPDF 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_off0000c15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 10104 bytes
SHA-256: fd808bf20fc79a5cee2256259cd77b3e61a172934aeaccb0a9ba69135de82b82
font_02_sfnt_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 16352 bytes
SHA-256: 82296939aa98e57dc418d470bd72789c64f34c68e5b780ea231fffea0033622f

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