Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b9af7f0cdcfbe9…

MALICIOUS

PDF

91.8 KB Created: 2021-09-23 12:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e20ce309610c1c28d1cdff6b8209f9a7 SHA-1: dc9c33d1556e8c33e579034b721a09c05b06c6a5 SHA-256: 42b9af7f0cdcfbe9725d2062899602153dc21d4a18bdf129293b6783fd45b802
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the nature of the URLs suggests the PDF is intended to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4295

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
  • 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://pixomot.ru/uplcv?utm_term=native+camera+app+android PDF link annotation
    • http://lica-mpt.it/userfiles/files/wipitijunage.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/petovibizos.pdfIn PDF document text
    • http://stl-log.com/htdocs/cljr/data/files/fobabobawozuvopisexa.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/seriposut.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/rejumomitewewi.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/1125188808.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/xokizapiw.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/21920406468.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/8057228981.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/31271186174.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/19259681643.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/deravebor.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/18534931883.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/51303211272.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130fa3a741cd---nikej.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a153e107ff---38827937388.pdfIn PDF document text
    • https://ms02bet.com/contents/files/86570991977.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/xuwubuvupoze.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90036344993.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/94980698456.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/76300362134.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/mufikozoralojeboregazen.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/58611840727.pdfIn PDF document text
    • https://parfumzone.ro/files/file/23340775.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/41853610473.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c8174d8ada5d67708d64ec7a71c60044/94080951546.pdfIn PDF document text
    • http://osayit.com/images/file/59356474243.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_off00014024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14024 18784 bytes
SHA-256: e704a73e1cd02ab963023f86c8a4ad520c07a8b2b416decaa8d768bd1e5e28a0

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