Malicious PDF — malware analysis report

Static analysis result for SHA-256 54076d71f9179f85…

MALICIOUS

PDF

90.1 KB Created: 2021-08-08 07:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: abc2169d6bc8af17357997c435463f68 SHA-1: cd365fcf1702340357326db9ea8cf7978c7311b1 SHA-256: 54076d71f9179f859fb6f87ee19371f60f8d9257c751b6f0525b89c42864531e
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8478

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://hajni.pl/userfiles/file/jorezinuwofexu.pdf In PDF document text
    • http://redfordunion70.com/clients/869360/File/18418085234.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/29596189544.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/xawamitogejejo.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/38992275766.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/p45stmu26i8bm7ereuuj18daa3/30420288948.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/97364443525.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160799d5832d58---xofefibalozijilapide.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/74f1ad8db4a61b1519203d10bc2ac9db/44741842736.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/nenumodufabaletezumegewin.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9b17b6bb---46465577629.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/rupivibak.pdfIn PDF document text
    • http://mopron.ru/upload/files/22029525221.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160acf227897b1---87537235456.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ddakrj6apmolrv66j90clv8ko8/tapadojexef.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/18948277536.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/f2ecd824c31ff4f61671d0ecd0a5c40e/3185738655.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/79613962704.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105031430574278.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/bb291a039a615045c8e9523db737dd21/80198454698.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae6d6188ec---mozuzofebuk.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/30169202029.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/sasinatajulojesekofodef.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/vidisodubilig.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/cc5obtk2moulf77da5tul6q8f3/61518469051.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=tabla+de+adverbios+de+frecuencia+en+inglesPDF link annotation
    • 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_off00010ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED6 10824 bytes
SHA-256: 599a287991cb962f63cc34fc832273469c63f146c88719bcb80e59bd6b313dfb
font_01_sfnt_off000127b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B2 18176 bytes
SHA-256: 5ce0c9efc979ef168ef1da8c386ba803e5e51fb802d0af2214b836c9f717bce8