Malicious PDF — malware analysis report

Static analysis result for SHA-256 6228171ee6b49a4d…

MALICIOUS

PDF

70.7 KB Created: 2021-07-21 15:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ab6916ab44227f1b36e0d0c29d81207f SHA-1: 99ba3a1f67638dac76f27ed9d5cfcab1b07b8870 SHA-256: 6228171ee6b49a4d5948e53db1722cea7e74a94e569e54c34f1238c3b8aa8710
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm used for phishing or malware distribution. The PDF's structure and embedded links indicate it's intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

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 http://industrialdevices.in/uploads/73039820095.pdf In PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ubaa2qvaofekhsd5n378jclov8/redapakujagotidiro.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/48b61248e485ac0a34359083c071cd2f/voxunokumonalisomazowun.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10d3581ea---jepijawum.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/mapuj.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2739105cbd---44859487052.pdfIn PDF document text
    • https://adreshosting.com/calisma2/files/uploads/43513914118.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/58518018003.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a5ac09175---12057210113.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28339d94e5---73964289221.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/7cd6dec91203c581c814c131f0c1ad42/95463169110.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/21b108b7551dd98b37f75f44554c3c8a/sepuridozezerurowuda.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/33854789081.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf74a42c7---bobuzugovamawa.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086c37684da5---vilib.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/085hmnq6fssld726u1j47rh7k7/74452203605.pdfIn PDF document text
    • http://dogable.de/userfiles/file/bazab.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/0d1fa57888790413c454fab1a13669ba/vumokedubafatefizibidir.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/25f40cbc6c5fd2fff222cac605bca132/pebikivazowojenefavax.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607808660e5ec---wafagezawanujidironupim.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/3b1f69e971461548e19319d263ed9464/petomunu.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/80045036807.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gamalitumifoko.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021430758193622.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5c34f0c42---56529520572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+psychic+witch+pdfPDF link annotation
    • 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_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 10348 bytes
SHA-256: 103f87e6217be1afc69641659351ffaecfa1345fde13fcdc9903a34921095654