Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e10ddb6316a9979…

MALICIOUS

PDF

69.1 KB Created: 2021-09-14 09:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2e051f9301a08d8863ece440d88d2fe2 SHA-1: c1aa7d3db969681ec47befcd50cf2e580adac8d4 SHA-256: 6e10ddb6316a997971411fb7d7e8c87acd6e0aa0fe556e32557eea715a7c9f4b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, many of which point to potentially malicious domains. The ClamAV detection confirms the malicious nature of the file, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/bozikavinapuwuvodoriw.pdf In PDF document text
    • https://cpsguffanti.it/uploads/file/41026698525.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/79800167508.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/54442665538.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/37864025975.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/71520850228.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/44c5d00906caacfcf0c93ee7a40cedf6/ribof.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/16309076116.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/rizaxedalogeposeginom.pdfIn PDF document text
    • http://ailizia.com/userfiles/vuzufavukiraguzisituw.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/79545225241.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/pelubixelepigama.pdfIn PDF document text
    • http://topp.pl/_topp/file/zabewumuxivubunuzinabi.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/tusaxumafesebifaxuz.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/kisibaxonawokigivive.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a81da639c6---86750118039.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/sutoroxuzipiwir.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/pozalusojulagebafava.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/9456631316.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/xusenibadilajoj.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/jidarelenumuvenow.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/97638106916.pdfIn PDF document text
    • https://turbooto.vn/upload/files/94028342899.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/57725041302.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/80789491425.pdfIn PDF document text
    • https://sharenkon.com/files/gojuvepuwasofi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=christ+in+the+old+testament+pdfPDF 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_off0000c9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F9 16876 bytes
SHA-256: e30e2921768f84ae6204512c69580ea9aae750d35fb7d4a2065e6df74c622f93
font_01_sfnt_off0000f566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 10792 bytes
SHA-256: b29f37ddd349ed0f477104940eaa577bf9f6b756b8be19f103b2f2d0e4b15994

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