Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93eeea17b4b6acb…

MALICIOUS

PDF

87.9 KB Created: 2021-07-30 16:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: da68adcc77c833c55ee00829896973fa SHA-1: 4c7a0df9c8b454774d9aaff3e2bc3c346a2bbdf1 SHA-256: d93eeea17b4b6acbc2d609f0dc29ed399c7b61f85e226630e246656b5388dda0
96 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into downloading malicious files. The ML classifier strongly indicated maliciousness, and the heuristics identified the PDF as a link farm on disposable hosting, suggesting a distribution mechanism for malware. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4197792ff---xarobafitaramazoz.pdf In PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc6086925d---sipupejidemikalewudiriler.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/a2247523af8be03f5a649c36c68ebc3a/61521356132.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/odncj7jmopdt1k6jqnke51vocl/parotasegol.pdfIn PDF document text
    • https://wittnebel.dk/file/runenimubewatenunej.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/a25473881ad6293f6eb98718e9c50bc6/dulutezerewijaravude.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f32d715ffcf---17885269957.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/55477933191.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf0ad6af48---piretorunoximagadanemojo.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/wuguligumadasexapo.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/3d5f6a1cde1fde4c43bbafe77dafc8e0/28363681001.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/e5ec6928a24fd219b579f6e4e7f2a578/12307056135.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083faaad1d9e---88818435842.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/meueh0guq8j7snpscb6f5arfvk/36285790794.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/51035176835.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/wupilatazuru.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/97228575466.pdfIn PDF document text
    • https://edarky.net/data/file/32804235869.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/49eea8a57e8fd4dfcbcf1926a96b04a6/90269952344.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/6adbc8797e2e20df7f5b46a4cc5ab217/92268937251.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/82266719808.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fatty+liver+diet+pdf+spanishPDF 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_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 10632 bytes
SHA-256: 2a262905f85c65d84d68046a37e89d21bfcaecc6bc1f23a605b0e82d45e43f1b
font_01_sfnt_off00010e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12617 17008 bytes
SHA-256: 25828805b4911bfb05e0575f09f73848e5783c1e10cd75011223e355912b1a87

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