Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe72f933bd2f601…

MALICIOUS

PDF

64.0 KB Created: 2021-09-06 07:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f67465bd049269d6264592b6c7dc3857 SHA-1: aa86c6692a06075e29d427934b37b3c0fa4570f8 SHA-256: abe72f933bd2f601b11ebe2abd23491b8b32309ab8654213acbb81c017cff963
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7883

Heuristics 5

  • 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.
  • 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://chcial.ru/uplcv?utm_term=convertir+pdf+a+jpg+small PDF link annotation
    • http://premsaktidal.in/userfiles/file/foxepapozabubis.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/14702054817.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf8f964fb---bovor.pdfIn PDF document text
    • http://ligneus.hu/upload/file/nobuxokegoxedezabu.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/kosekefob.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20219325383487.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/4c7a4c8f0ab0c2e4112b8eae94110e54/xomuzurapuvowarupivemam.pdfIn PDF document text
    • http://arslanemlak.com/E/file/sejove.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/32137234878.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/22642625895.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/rqhv5nbe21c8u5l448sbmv1obk/84841508657.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a07a7805261---makivaladomerojujupanafi.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/kanixitolezej.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a75306b0a6b---60208121385.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/pexudax.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c9305e9f1077168f51c39c12bc761696/zorigagogenasadunatoxade.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210617_AD509D21CCFE5C02.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/80679244228.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/nutiwebawusunufatuf.pdfIn PDF document text
    • http://twtime.com/uploads//files/202108030247432474.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57425508906.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5d7bf0aea---26600581035.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///bidupebenubeluwujiwexuwa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974587bad14---wovorogipevabufoxuxake.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081226665f41---47966609209.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 16864 bytes
SHA-256: 783ddcbe17fb5a9632172b8cd516c20c53008ecd673361b54376330063dcf7c9

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