Malicious PDF — malware analysis report

Static analysis result for SHA-256 90cdb7b8d5dbb2e2…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 04:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 10be367f1a104dc4c61c7a93a5ee32e8 SHA-1: 683cbe1fca5051598c9ed70dd1b8d0935d4571e8 SHA-256: 90cdb7b8d5dbb2e21a6f88047631a09d15f3ff52389b371406807a9eb1cfec69
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://nomylo.ru/uplcv?utm_term=dr+seuss+abc+pdf PDF link annotation
    • http://synphabase.ch/upload/file/pubusuvogixosejarobis.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/93369060415.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/lineloguwap.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146817e6c6c8---piduzesumowobomu.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/25371356130.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/bitid.pdfIn PDF document text
    • https://thehouseproduction.net/file/zaguwovuzojigidananefo.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/rudajikikasigetususim.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/kepivarajogubelamu.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/76629764285.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/60510194294.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/73440923208.pdfIn PDF document text
    • http://altinay-law.com/images/file/25958499942.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/avc9oi8lc5l5v08h1irp8qo2l4/98925899784.pdfIn PDF document text
    • http://podushka.by/files/files/kupixibaxesusup.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/96625530171.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/nujamedoloju.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021090205541520.pdfIn PDF document text
    • https://stotex.rs/files/67674593277.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/kinitibijuxugebenopababi.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_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 17040 bytes
SHA-256: 55aef9501f2187461f4668fbcf1cfa63a8d067087821f16e708b4096b121d9f2
font_01_sfnt_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 10392 bytes
SHA-256: 317560eaa72ae42be7d47611c7abf4e8941fbec4628139114cbf000ae434167e
font_02_sfnt_off00012641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1