Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df9eaa28bcd711e…

MALICIOUS

PDF

87.3 KB Created: 2021-09-23 00:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 32ef744f73b40eaa865a361c49967930 SHA-1: f4d06b0b43893e96013246288fa0d2cf4483c4db SHA-256: 8df9eaa28bcd711e4ccf47ef5c1c9f9e368388425fd38f445bc76650801c0408
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The PDF structure and embedded URLs suggest an attempt to redirect users to malicious websites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2806

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 https://crysiq.ru/uplcv?utm_term=a+1000+splendid+suns+pdf PDF link annotation
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae35caa41d---vokevali.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/sumitiladasoses.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/viwozegomojusukarose.pdfIn PDF document text
    • http://itena.si/uporabnik/file/66120952111.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/9970302591.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/rulonunekobu.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/xixotebogetivipivepeze.pdfIn PDF document text
    • http://355353.ru/userfiles/file/nuxew.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/61274179167.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/81819715034.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/58254eeee94f8877c5349b25cb6a4160/886902878.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/rojudizanikok.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210902125126.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/75138990578.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/66360990484.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/jakafudinorum.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/5374031922.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/navubudivozidak.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/nijuwi.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/kifinarobeku.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/xasuxifejasitopikafegez.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/57162138973.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/21139500893.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/83820219007.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/67240063760.pdfIn PDF document text
    • 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_off00011f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000137a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A5 10268 bytes
SHA-256: ea925fa60c033e104fa3b171113287fbe9636070996e99e761e619329981ec5b

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