Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba54117ccfdd883…

MALICIOUS

PDF

84.5 KB Created: 2021-08-20 04:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89d0e115599419a1a50ba84f28c71a99 SHA-1: 74ba227617f2a1a08f7209ee024e91a05682530f SHA-256: eba54117ccfdd88370a5aab8641df9d53e57802fdece7fc0d43b3dbf24615fb6
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 and contains numerous embedded URLs. The heuristics indicate it functions as a link farm, pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or manipulate search engine results. No scripts were extracted, but the presence of multiple external links and the overall structure strongly suggest a phishing or content distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/bezenanilizijunimijazufe.pdf In PDF document text
    • https://edinburghpools.com/contents//files/mexesuwav.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/foluvitokexisawotoxag.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/3095930943.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160956f824541b---tedamizonozaribesizexo.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/3907558402.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a70e7a57eaf---disewuzawesewepeganodaju.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/dojazitokexelaxagupo.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/pugalomewosorono.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/5377800874.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/c960f7da11e52c0fae98a4c0bf4b4fb5/vezopowigus.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c49ebea9de5---74935689891.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/70322808588.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/rolelibetovenoruru.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611131e879440---78703383382.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/1c405c455a04ee465ec18f6b039d5e7f/bederuzesupugetamagazupus.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/pefoxawetexupego.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/nokutidafixusunum.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/0c1b245ed55c8f2d9c791c5545fc08cd/28813951405.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/kamixupolad.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e0b062ba---bijosaxalikugik.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/5480632411.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/jojozubezi.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/284kior73nd3bgrsnvinp4nrm9/41655373328.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a4ff367b5---48567255430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=renew+tlc+license+statusPDF 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_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 16952 bytes
SHA-256: 8b74761fb96b108c49e53e7c7fd67f6284f798828b3b813775f1729cae343032
font_01_sfnt_off00011499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11499 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB0 10232 bytes
SHA-256: e6f0b20cf97b13aba45447e524e3806227c02e3ddea5a63273b17fafd21cb9a4