Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0efee473328ad4…

MALICIOUS

PDF

79.6 KB Created: 2021-06-09 20:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fe934b67e1ca4775a5e33f83a6d638a6 SHA-1: ab58de1dbe82b675f5d22ec03ad12243bd1254a3 SHA-256: 6b0efee473328ad44bfb34f7a0fd9deeb63430720ee692d6a6909b94310b4aa4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.8485

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=good+morning+beautiful+images+download PDF link annotation
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/2643fadb95eb799a4cd291f0b17d1b2b/fijavavexuxusukutik.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/54004648694.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078924f5007e---bosigaxezuxud.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/78387147376.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/39f16f16be1b62f7f3664ba760346902/9717867414.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acf62103fa---wanipekogijoxu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076501e96c65---7971602110.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae8da36c62---xaledosoxuvemotar.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/29943969345.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab1c47fc8d---34860730380.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/6334036738.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076b6104d950---texorusu.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/iivtr1gae3pthb56gtvvb7ke42/wusidadijuvivegexawo.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a944e954ddb---72894304439.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608382d0ab9a9---84034593356.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/witamelazilakivugupoxop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 5492 bytes
SHA-256: e2e73113fc6ac22e6199d473086cbf89723fd719d0c43b3a0164660ff25a019e
font_01_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 3400 bytes
SHA-256: e6d48e1640ac3656e5d1131d8a0f38719a782f1a1e58e69a48d970b365e552ac
font_02_sfnt_off000117a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A9 10736 bytes
SHA-256: de913d9e801f5c32873355e34b71ce11004857210cd35f21a096e1a5f3d43b37

Open this report in the interactive analyzer, or submit your own file for analysis.