Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c8d8ad53b2d654…

MALICIOUS

PDF

71.9 KB Created: 2021-09-30 10:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 55ae5a707ff537f62bd6f72c66649b09 SHA-1: 8201b47d3bb5367e8d011338b9ef78462e5445f9 SHA-256: d6c8d8ad53b2d6544a48c0dee713f8aff555fa4762a1d570c1df53e2e69bfcdd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://infrive.ru/uplcv?utm_term=krillin+and+android+18+porn PDF link annotation
    • http://vankouwenenmastop.nl/UserFiles/file/17886378238.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/88528011096.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210929080529.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/4947820829.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1631187418.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/60687134216.pdfIn PDF document text
    • http://gibisch.com/files/files/43060244749.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/zogekosag.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/17421192524.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/tubovufaz.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/72321904383.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210903_052916.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/biferotegerikavilaraxag.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/33387174531.pdfIn PDF document text
    • http://sowaprojekt.pl/files/file/gesifusixexi.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/88109945458.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/fuxubomonus.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/kexolibogixo.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/6236507145.pdfIn PDF document text
    • http://generoussecurity.com/uploads/12602700813.pdfIn PDF document text
    • http://recrute.fr/files/files/vokedu.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/lexixigawo.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/18073284043.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_off0000b036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB036 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC848 19328 bytes
SHA-256: e6da277ca3c7b9f3569f45306b040d591c974c4b51f8ae326cf65e970bd5aaff
font_02_sfnt_off0000f9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 10236 bytes
SHA-256: 69b8ca8bbcd4bb3a26e691bb6cbca2c59a7e0e6358aaec19c269efd663278673

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