Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4e02922b2c0c7f…

MALICIOUS

PDF

67.9 KB Created: 2021-08-10 06:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a355a7faa3e89fc68bc7f9b3461bed14 SHA-1: 9e1ea42a7644c22ee7b00bfedbaa6f96ea69e5ad SHA-256: ee4e02922b2c0c7f72e6874d4748febd1ac775947ffcef9c73fea7e2832c4b2c
94 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, many of which host other PDF files. This suggests a tactic to distribute malicious content or engage in SEO poisoning. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9547

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 http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b63cc034e2dba09de296c945119db375/giregoriloz.pdf In PDF document text
    • http://pwr-tech.ru/userfiles/file/22375804728.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c68a73992b0---35562972585.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/93438159070.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/leputobidoxakam.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1cdef0c9bf---87171664098.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/jekeji.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/3428272158.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/jr1he0b0r8uibog4l1knpe5fkk/81049568483.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/18b40e21cb879355329a34ca46a7a6b5/85695883855.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/morupegetuvatopimukudev.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/gawobijukul.pdfIn PDF document text
    • https://businesslife.com/content/files/87259793675.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/6524251971f146c0a54d6109bdfef01e/mesimipidezokasivisupedur.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/13837347235.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fcfb716b3c97adc1947950626678ab20/robevirameluziwekimisefi.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/8402e61242639239f33549b8446367cd/jadupakafobefeniju.pdfIn PDF document text
    • http://potya.com/gixozawonesegokarog.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///litadomarisuritalezoma.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c8583b60d61---90630533018.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/32723690609.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/kivaw.pdfIn PDF document text
    • http://snsi.jp/image/news_file/5789200323.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/mitamexegiwojosowaxaxinu.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d0e08b24c192db0193ef8d183ff6d983/pigojuligotoso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bosquejos+de+mensajes+cristianos+evangelicos+para+jovenesPDF link annotation

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