Malicious PDF — malware analysis report

Static analysis result for SHA-256 174cb67d8df16992…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 01:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f6b4ef73e1378e500aa7430507cb5af8 SHA-1: d4b50fb4366cdb140e3350a66f9b41630a2f80f2 SHA-256: 174cb67d8df16992933ebba80ad018a454ccbb735995f21f127a6a16aa33fd59
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The document also features a link farm pointing to compromised WordPress upload storage and other external URLs, suggesting an attempt to redirect users to malicious or phishing sites. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i55bb63bmug1kkfo6p3218qsn8/15523838544.pdf In PDF document text
    • http://canadanur.com/resimler/files/weled.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/luaga2s7q8e29vktcrbjqoetdu/gazakuxaxamawa.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/setajowijikekidominolure.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/69637743748.pdfIn PDF document text
    • http://bryanhigh78.com/clients/72554/File/saxip.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/dewexun.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/xizaduvi.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612029b837a87---29588271499.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/45251199458.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/kr76lukdf4ei51vslmussldu9f/29680365639.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/ketufeson.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/4bv8pdrahl3itglcsp40v0jl44/tokegulerokoguvobevajod.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f256d69e8d8fb7535bf2922a46f3cd24/11666228358.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16079002b5f123---62162834318.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/41323251400.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/80952617502.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/66679412799.pdfIn PDF document text
    • https://isosklo.cz/uploads/80101342195.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/62c34bb6caeb88b81267689ee59b823f/dusatajamopulevad.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/fifelakitorarikumukimijot.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/napaw.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/wigovabiwisonidufowu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073d1cdc3380---32381903009.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6de3422f58---jusoroputukojavusitopi.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/fugimosutenivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=minute+maid+park+mapPDF 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_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 10404 bytes
SHA-256: 682040042814835b0c1abb6efb2227bb36d452efcd211d92ae5fa2a8f026db9c
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 20756 bytes
SHA-256: c541771a204c71713e7e1b5bc8f911e296aee100c2fd78a8b3a9d095253c415c
font_02_sfnt_off00012f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1