Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c06de10f2d1d98a…

MALICIOUS

PDF

84.0 KB Created: 2021-08-05 21:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f94581cde3a4820949d0a5a9233131d2 SHA-1: 9b739381c68a812dbdabd4cc18d260dbf695ce58 SHA-256: 2c06de10f2d1d98adba7aaeb9fc3359145afcc54860564f689d8ac8f9b92faa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/uplcv?utm_term=adobe+xd+tutorial+espa%C3%B1ol+pdf PDF link annotation
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/122ffaeea332defead87c335ec63f411/tukulijaxigajunojadaxobir.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/72895407127.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/9f6a539abb69d5caccf671d795761b88/lupiwaxarobapedu.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/63154235939.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/bizawakemijewara.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/wifuzul.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/14ad76b4df4f5b39d466d5887739d3ee/77412317206.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/10782107107.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/jezavapuwifazogaxemezol.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a47a48dbf8---36216094036.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/nimaxexebo.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fcf9dc5b022fabd03033b0225e2f58ff/26350803723.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021080215046_1025688399.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/3908221924.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/84344f22673ea0ce1e5b659cc098b5b7/fepegamuvijejil.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbe036c756---narodilakemizukirok.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/fbb942a8d82d1905945de265118b4081/35526991562.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/2f37bf5ce9a0700ae870bd30bbc58ddb/vinumubetejaxomopirowu.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/0c8efe5ccf1d34f6e71f2af5134f5325/wexekilubinegiwi.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/73cd6335c44a069bd631c2db3531fd06/meromokinireze.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/69217159805.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/57153604985.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/ligipen.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8fd97621ee---rasobezibefax.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072413024578.pdfIn PDF document text
    • 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_off0000e1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 10916 bytes
SHA-256: 0e511476fb92d3ea59ba00c33781280873872d105a9457f0bdbd4d42c9b503fd
font_01_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 17740 bytes
SHA-256: 9a542fc8766d782bd0e5ebc39face04db8767235224067602aa73d2ede4f6c6c
font_02_sfnt_off000127e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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