Malicious PDF — malware analysis report

Static analysis result for SHA-256 a493db9814599178…

MALICIOUS

PDF

72.0 KB Created: 2021-09-14 11:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: d202cec819ec987510919dfc3d284aed SHA-1: 57a2e3ee7f7c097f72d7bd9a8ab2214cdd55b023 SHA-256: a493db981459917849f5a2d98af2a2dfb042b155256c3006a739497b0c09501d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users. The ClamAV heuristic identifies it as a phishing trojan, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link aggregation. While no scripts were directly extracted, the nature of the embedded URLs and the heuristic firings strongly suggest a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4393

Heuristics 4

  • 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
  • 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://oreade-breche.fr/userfiles/file/tizofitaluvareveniterir.pdf In PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/fediwedivilixuridokob.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/53264905838.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/32089867793.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/xetamasikomadilorix.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/murugewofakebazugif.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/fikuxixo.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/gofigezezubojinepiv.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/xunut.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131b2b37383f---55927049747.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/simapa.pdfIn PDF document text
    • http://pk.mo/userfiles/file/vataweretelodov.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/mijifibuvifo.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/42657579056.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-3/20210903062158775164.pdfIn PDF document text
    • https://spacio.hk/attachment/file/rosupegexojavogefamiwu.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e3b2e0d016f0c909936295a739e8a4e7/49998158200.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/sewusilezexeg.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/fusutirozugokurolufoduvu.pdfIn PDF document text
    • https://tarsiman.ee/files/file/16720550635.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/wavawenewatezukutu.pdfIn PDF document text
    • http://yuli-china.ru/d/files/sojenivigugafure.pdfIn PDF document text
    • https://satesayap.com/contents/files/75222018308.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gta+san+san+andreas+cheatsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 10248 bytes
SHA-256: 5a4f6f05108cd9fbcd35f268ae5e599a9090e61f126ad4376b5bf4956624c91a
font_01_sfnt_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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