Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebe549562859614…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 06:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 85893cde9d6b9a41e3ffea875c06c68d SHA-1: 5b983fb925f5b44215184043eb4f55e601a23867 SHA-256: eebe5495628596147e9e2ab6aebccb70e9718719980084c55a1700780036b68e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm designed to attract users through SEO-optimized keywords, such as 'gta v mobile game download'. Several heuristics indicate this is a link farm on compromised or disposable hosting, and ClamAV detected it as a phishing trojan. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=gta+v+mobile+game+download+and+install PDF link annotation
    • http://mygiftltd.com/userfiles/file/gurisosalonatuvaxi.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4544db02d---sagorodanekuxis.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/lopizisedapefeziwid.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/54050810642.pdfIn PDF document text
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/jumuwojol.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/rufepeku.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/q3uos1f2vp2dqnhffpsunvpmk4/84295862694.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614011c664804---majurazotaderexod.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161337c4359910---weloli.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/jixalekifixupakaxanokuk.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/dekomipibu.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/14158098873.pdfIn PDF document text
    • http://gapp.fr/medias/files/rifatusumipewinoxezo.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/kutexojitedobuz.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/nedifowivasujakezuviv.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/6317899701.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef903ded3c---kuwisid.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/jemewudonetisefasologesuv.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ruq7mu2i6nm2794q9m48shdcul/33487039776.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/fakewatuw.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/11242898775.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/jejozumij.pdfIn PDF document text
    • https://birotex.rs/images/files/87481357990.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/22472374626.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/25526654459.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_off0000da63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 18028 bytes
SHA-256: 5245bd13fa72fb0bbb360ad49a26711c17abf7a12b2b544d239b28e3fb860c88
font_01_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 10820 bytes
SHA-256: 78c2d4e9b3a95835dc388577bc36ef9f9e0b8a6febc104f07196316c510b3765
font_02_sfnt_off00012296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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