Malicious PDF — malware analysis report

Static analysis result for SHA-256 4106bf6793ec8994…

MALICIOUS

PDF

84.2 KB Created: 2021-10-11 00:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 91626c44c15c9abd7e65c441090d43e4 SHA-1: da17c66afee326f5d61c1a71ad1faf94e5880a7e SHA-256: 4106bf6793ec899484560d72648956717ac900fa63d99a056d9aeaf5beaf8d5d
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://coretry.ru/uplcv?utm_term=please+find+my+cv+for+your+perusal PDF link annotation
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/peludesupupisemukobowosad.pdfIn PDF document text
    • http://mp-journal.com/media/file/bararujeralexewuzija.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/78959980462.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/4976413819.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/52944859840.pdfIn PDF document text
    • http://grdr.org/paidel/ckfinder/userfiles/files/52413881776.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/nideged.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20211008_18446FB4A71FF3DE.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/9623661733.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/27807046598.pdfIn PDF document text
    • http://seattledesis.com/fckeditor/file/jefoxafifesex.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/rasunomasagonuwuwekevip.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/dinodo.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/fetaf.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/duguvodad.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/80918782177.pdfIn PDF document text
    • http://standardamulet.com/files/files/wekowozonisi.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16160ef0ad47f9---zivanipufoji.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/xutiroguredefadigajonuxow.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/20197573776.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/93479829363.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/gireboxepusogum.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_off0000de2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2D 19752 bytes
SHA-256: 23bb1a429b8cdd688bc15faae6832dba935ec02103db6f4edb120b8c187c6340
font_01_sfnt_off000111cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E6 10964 bytes
SHA-256: 5b045341e445e4d8c54369a3dbbf99b8e1d70660b0e83912c177b97dda18af6c

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