Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a49241c0b3560f…

MALICIOUS

PDF

240.2 KB Created: 2021-08-07 03:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c05a1de50c3b733bb041394a40555ae8 SHA-1: 6c1fa13c92636ae56d7f120e1933f9969f59cf2e SHA-256: 64a49241c0b3560f4b9a51d41e102c4397fd1f83f9165b55fa6705c84a22d7e0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://daiichigroup.net/uploads/news_file/pubilatuwaramusanedav.pdf In PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/7c23778d0a615a3679a5860faf969a5c/99421636756.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/44310578626.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/34919988284.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/bd7fc461d27a1f364afd90914d777866/36151354679.pdfIn PDF document text
    • http://raczcsalad.hu/files/zuwul.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dadb98dc64839e207f7691562426e821/40716218381.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/1b86e47158a7bf631a840599685f25c0/jusexi.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/21204231748.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/lefagu.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/38431075109.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/43335513470.pdfIn PDF document text
    • https://anfauglir.com/images/file/sapoxatexuxatuw.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/zejebefemojiteweliw.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/zuzupusu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ab4999f7---difuludop.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/rowodopadozaponi.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/sedonudojepuzik.pdfIn PDF document text
    • https://ladangmimpi2.com/contents//files/wiwowuviso.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/28c3a62dc3e599a96fa01ef61d0c4738/kumotatejexipozifabe.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160cb31045bc66---93489535964.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c2959b1174d---fofasakokulegamoxosowexop.pdfIn PDF document text
    • https://bloc-immo.com/images/jimaxevumotupul.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/tufabisojusewetonowuloje.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/2acf8e5ffd973c141eca9689f9c68e26/wolunawilur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=man+watching+desmond+morris+pdf+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_off00034fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34FCD 11148 bytes
SHA-256: 6bf21ef71fa2223cb8f29796486e98758ad5517685a5f0fd29d445bb1fc625bb
font_01_sfnt_off0003697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3697B 18228 bytes
SHA-256: ce3e3d776380e42537a6f9bbf4db26258954139364bd21aaf5567e59c015356a
font_02_sfnt_off000399e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x399E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1