Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58d419b89309d8e…

MALICIOUS

PDF

85.9 KB Created: 2021-09-11 00:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 727b78d47fc6d80b2685eb684f4fd40d SHA-1: f45030480617cf7cc9e1dc66a2d12b2cad0dd417 SHA-256: a58d419b89309d8ef734823b5152609d7bb3984f399d11f839fb2dbb15a24126
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8416

Heuristics 4

  • 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=demon+slayer+mugen+train+stream+online+free PDF link annotation
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/tonane.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161302320a845f---4511972918.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/sogemagemibezijimiw.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/tabeparojibip.pdfIn PDF document text
    • https://jss-moms.si/upload/File/30084928279.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/nunadufuxafodulofimet.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/67559137234.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/847610250.pdfIn PDF document text
    • http://belean.pl/userfiles/file/12138934777.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/5880973938.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/96406022ed02724c65ae9c25206e360d/dinelibewafesapeduven.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/a689d0ef37e7ed0875deaa63246949ca/gikakodupok.pdfIn PDF document text
    • http://rockbond-aac.com/id-admin/fckImages/file/40279262486.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/zuwerisoromudinimeruw.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/91487770514.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/66486637882.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/65400805645.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/20950153411.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/3893221574.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/xitovoxirawidadisibera.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/muxekokunilisejijebalonuk.pdfIn PDF document text
    • http://remobudostol.pl/pliki/59109471259.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137553adccb9---kezegasowuredadikuwet.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/ravoxupasuf.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_off00012b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B07 10772 bytes
SHA-256: b53c18735faaa101fcde79893c126f4bdfd54923c2e2bbfe43b94fe9334195d5