Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa1ad0d9bc3aeba…

MALICIOUS

PDF

86.2 KB Created: 2021-09-12 04:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: c9220c3f615b8697577e26bfd8535635 SHA-1: b4371e2ff0843da03bee320e94f2645cd4b664ca SHA-256: ffa1ad0d9bc3aeba827336892bdd63e4482c43aca45d4ee9f48c8be5f1a5983a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/38645018991.pdf In PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/kujuvanupeguradipado.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/jirugosanipaxus.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/37551845232.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/20108859084.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/zugamekuliwopisatifab.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/59968250379.pdfIn PDF document text
    • https://banghenails.com/upload/file/24394448354.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/1855401320.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/nagunifoxi.pdfIn PDF document text
    • http://webs123.com/userfiles/file/26953190963.pdfIn PDF document text
    • http://indemo.pl/Image/files/tajenebanaratujafufoze.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139e2f035fa9---39935405890.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/lilizuxorimagimojugujajaw.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/21727061234.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/fepigejewomadag.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/gegibegowi.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/42619048687.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/nekebor.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/15087875335.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/repelujigunosomof.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd1b5c5b98---95057209651.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/55785498408.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/50615393786.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/zevuvusidega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=thoptv+for+windows+8PDF 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_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 17176 bytes
SHA-256: 7105e5a1b82256af189409c122e0a0c6090754941784bc88781fb1d0ea2084be
font_01_sfnt_off00011b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13320 10580 bytes
SHA-256: fb1d3290f2b999599c7bbeb1f77d205f7d4ab11669d03439e8ed92eef3dc6c5a

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