Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d07f50a2cceb998…

MALICIOUS

PDF

86.1 KB Created: 2021-08-17 13:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 9d00055fa263115d7ff070140d26d512 SHA-1: 3208fc9a84e987b2b7e0bf25d80e82e08c7cddbb SHA-256: 7d07f50a2cceb998e3fdc6497037630855118b179e7dde3da55e7d7f2b5cb4db
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 0.8709

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://infrive.ru/uplcv?utm_term=download+cinderella+%282015%29+hd+720p+full+movie+in+tamil PDF link annotation
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/2027af535a67654495dc28a5efdeeb9f/94342306888.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/80098363234.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/nivajovuponujonugejiwafun.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/ziwufafilagim.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3175276674---7826231846.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-13/20210513083405109597.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/dapupesa.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/33930677489.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/30503717192.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/pezamugivesewerap.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/94987282438.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/kuruxixope.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/c1c43e020e9730a40a6e0c34da2d4ae1/fupuririzusuwezejitademi.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1624526431.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/38342a8a75b058b9c0cff832d9b2bf4f/85762595413.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d078a749c93---biwusojafolokaxowikajagis.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/0ph2ouaf0f6o2mrrq5ce714jt8/53432058144.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/zifogapuxijaguxedavadiket.pdfIn PDF document text
    • http://gonuldoviz.com/upload/ckfinder/files/27398251963.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/e55735ca90a401ae7fe611aaeeaa5d7f/33765342670.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58523072685.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/lenebuxijujofudeje.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/varis.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF741 11604 bytes
SHA-256: a664d664c184013e3f02a3cb592c66aed78fb80ca3e4e5c1691851676a8a72ca
font_01_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B08 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825

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