Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7220c31f415a99…

MALICIOUS

PDF

64.0 KB Created: 2021-09-08 11:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 362183d450a813e287bbbca6cb66bad3 SHA-1: 7746b4bb9aca00e635423e187061b41a33af882f SHA-256: 9e7220c31f415a999c65ae950f3f2646d58c5cddedf99f7254601933dd929c7a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous links pointing to potentially compromised websites, indicating an attempt to redirect the user to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The presence of a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://x04ydivan.ru/userfiles/file/runilemukimagumetewerat.pdf In PDF document text
    • https://ijpdua.com/contents//files/dibuzegibasazeluzikopefav.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/58714879139.pdfIn PDF document text
    • http://e-menu.hu/editor_up/mamuzaweti.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/97403729876.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac58457cd94---97660098166.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/wixigurukaxodarimekapagos.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/8863198010.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/rezatunowom.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/jrgllbhijsv627df1btpp8ekf3/97467981747.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qoq5hqhcr8vqapgjl31kpqjbq4/xanopiturubaniwoz.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/sn5bkk0tbc097qrad7cigs6pu7/87799418965.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100bf4863ad5---84846674140.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff13713899---99569726971.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb19344ee8---50754271038.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae654f285a---peruzilu.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/fotej.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/80b1826921c02f9c3d02ca9f51db2a9b/funobakenu.pdfIn PDF document text
    • https://dafelia.com/files/fodupodu.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d950b406a---22117882876.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bb9c4071097e8dc4e38d229b85751cb7/pagipesitezilazidigavelig.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/87080273488.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/320de36f7f5a58aadea98b2b314917ff/12953301272.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/pokupekirebosivoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fill+in+the+missing+number+worksheet+1-30PDF 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_off0000cb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB91 11168 bytes
SHA-256: 118a5e7d0628a1ee821f6a8fbeb19033235b149bb105748013ea791d63e0dd48