Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed0efeae1b8f296…

MALICIOUS

PDF

74.7 KB Created: 2021-08-08 06:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5c2813ea134dacc9b80c038d43e630a8 SHA-1: 3a8025191b610af5f33cbccb79d20895d47d2eb6 SHA-256: 2ed0efeae1b8f2965d0e073bd9005694fefee8eb72bfe300f81d0cfaf050dff8
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/s5c3k8v44d27ohostqchv06g6k/50326336600.pdf In PDF document text
    • http://studiolorenzino.eu/userfiles/files/lijusap.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3c7ebdea---38274667670.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/92589605266.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/26207832865.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/60409715746.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32070951238.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/a7v4c9pbd0b2seifkboqjbj601/wamenisume.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081227cacf33---jozavaxulime.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a17d941bc---lizewega.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/zimejafonojago.pdfIn PDF document text
    • https://senfina.top/uploads/files/wutanevegitogaw.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/tivagubiwaveloxodujupit.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/nesoxirozatebuxojaxoj.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/safadur.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/4t4svuabi0gbi97jt0mulm36e2/zegedupovofevisosobutil.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/27641590665.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/napoxedofazakojo.pdfIn PDF document text
    • http://nkmate.com/FileData/ckfinder/files/20210718_AB89C9959D8B607B.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/i8lq6dckofamu51s6b3hal2v00/luzomipulaz.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/10948885525.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4af407fb0---4610907081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=fundamentals+of+electric+circuits+alexander+sadiku+solutions+5th+edition+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000befa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 11376 bytes
SHA-256: 566c66fc404a21b552d21a7d87762932588b5fee155febb68919cd981856565e
font_02_sfnt_off0000f1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 16296 bytes
SHA-256: 157a8753cc667571fa47ddb15170a49265c2535597d9d16cd3b4c41c614c556d