Malicious PDF — malware analysis report

Static analysis result for SHA-256 02012cfcee1da126…

MALICIOUS

PDF

82.9 KB Created: 2021-08-23 12:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff7cb342af03e79a4d6a306a2d88d458 SHA-1: 5a3a2e051ba5066612efe87d079b5c88e90974d4 SHA-256: 02012cfcee1da1264ed54d6fdb34fbcad949ea34a55d2f3a8b76e237183508bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised WordPress sites, suggesting a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160717978be053---gikubijula.pdf In PDF document text
    • http://marinapogon.pl/upload/file/sawijozakarebox.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb79af56845---nurefelifegiregasawos.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ce776bd5734630ed3fafc5467ce3a9f6/mokinegewikijetopizulu.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/246qc3trqj7slfqv980jc8spv5/85712499944.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/b52db44fe68f8f9efa878b5f72daa0dc/lixavijoveridobuja.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/migowebilaveb.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/mewinubibo.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/864a74a434242b3fab20e095c36a5484/piremararuto.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/0fa5dd35613e38e81ca23985c95c767a/xukobebe.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/25846776034.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/bk09g2saa54ndns7mkqkq8hfoi/41791489105.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/vedever.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/mozun.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/95149262416.pdfIn PDF document text
    • http://pk.mo/userfiles/file/8016906835.pdfIn PDF document text
    • http://kbinteriery.cz/userfiles/file/jorugaremifitapexixuw.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/96670849508.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/jelubugulotisomalekeke.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16119a44843f6f---wopedafuvugagefenebe.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072c12255320---zudomabiteze.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/lilolegukiwideb.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202152461357.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/819d8a931fc4d6ab7eb48317982775fd/dajutomoxogopi.pdfIn PDF document text
    • http://afslab.asia/upload/files/13384274605.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c75b861e0e2---jogofefuzodolijudumev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=bounce+classic+downloadPDF 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_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 22888 bytes
SHA-256: 8f06066d359fa20cdea05d1ad38283856a937c89836272038d679d3db322dd5e
font_01_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FC 10404 bytes
SHA-256: af6dd2c8e792b9b690e061e972f4be9a7ec7ba3fef7e6724713beee1d6f85309

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