Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc9e3d943606ce3…

MALICIOUS

PDF

60.7 KB Created: 2021-09-24 18:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9296575c1e55a6defb444d6ed2d85beb SHA-1: 891b55035cff9c910ad0e4171a7b645ce8aee8c8 SHA-256: 9bc9e3d943606ce3cc5855157789c7d041c1bab7f3221462e37923ea651780de
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple domains, including compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to phishing or malware distribution sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4021

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://allytemp.ru/uplcv?utm_term=les+naufrag%C3%A9s+film+2015+streaming PDF link annotation
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/pebolel.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/52382132024.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ce2bbbad5---wevofitofavulujaxekaw.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/42191699998.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/gawiloxivonomigigaj.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/wamemitodun.pdfIn PDF document text
    • http://kezmosas.hu/files/file/4844342631.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/28995317631.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/19199745084.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/36433073838.pdfIn PDF document text
    • http://www.bash.cl/media/file/sonisifalewog.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/kovup.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/xovajulewigelejodol.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/87253788021.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/23725023577.pdfIn PDF document text
    • http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210905_230433.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2476236a5c2d55cf0ded62c84a02462/rakofegifex.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/gibodavamugatonirisebez.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/tewifawefegoxafagisedanu.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sibidadazututeposepali.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/meziperaxif.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614408ef90825---walurumizud.pdfIn PDF document text
    • https://arkadas.yuzuktr.com/eskortarama.com/resimler/file/vonoviliririnogidadufebin.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/viwusiwedudutagisaladozi.pdfIn PDF document text
    • https://umutfm.com/resimler/files/xidumujegawes.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147850bdd42c---30065199718.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144435914fb5---51784455285.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_off0000c161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC161 11076 bytes
SHA-256: 51ce2b9739f00851c6e80071dc4f9a1844a12e1ceb9c313a63553ad0ccb6eda7
font_01_sfnt_off0000db06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1