Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25bd086d8e91265…

MALICIOUS

PDF

97.0 KB Created: 2021-06-27 23:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 485e141c62c1afd19e6748707268d935 SHA-1: a7480ec01e265ef3acaef794a75f6215f15358ab SHA-256: e25bd086d8e9126594eec4960f9460900f05698f8e2d019ac3f40fa4d14c24fe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous URLs hosted on compromised WordPress sites. The ML classifier strongly indicates maliciousness, and the heuristic firings suggest the PDF is designed to host a large number of links, likely for SEO manipulation or to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ocdrd6fc9t6igt6k31pah9gho9/71958253231.pdf In PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/2jkk8avk06o9776m1d7f0tdr5h/nebirumizixewugemoxuvofu.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/fajilazezarupuxedetap.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/94689842226.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5834cba656---77219492239.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b13dce47---kawenofebepuwovusolazujap.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/f6fbba31b15f4cbb0decdb8304b1d2dd/68863852475.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/93027961398.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/4ba828b0ef596376ca3dfbd0e85ed4f4/31029889457.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/gimbjopel3bqf0bvk2msmnod3e/23748131962.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/flv3hvlnejk99rqqc9idd3l147/jiluwovedepezuwutomepid.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070a56692300---rowagakogurofemamodi.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/xabesulusa.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/filegagumido.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/50bd8e44530335908d362225ad38a924/jopukukaduduzibizidigako.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fdad4281f---3067316655.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/400kt3sg3qj0u1gd282795v9r0/jodifiju.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/e1aa0b6bd14d4349e26ba5a276ceae2a/42823699076.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/cbc2cudvhr4ghjg4f5r1u5vk0b/34091165734.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/7br95jdgb7opmog8b7lgf2b4gi/52145011131.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e1a67eee4---82638988498.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rbgt6ntk79srlokq9fgd28f5q3/pipaxavik.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c5b97c3a4---zufuvelixofunesama.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/110e8ea588a1498c8499ebb5cec810ca/29709704617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=best+way+to+fold+clothesPDF 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_off000119b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B0 10528 bytes
SHA-256: 3434d1229d4978346729fe777caf3a161c68897df7ffccf79bfd1e5372eaa1e3
font_01_sfnt_off000131fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0F 17252 bytes
SHA-256: 8b2ad937ca9bdcf99e78b2827a9463749e2f38ddecf886d6ecedbc7557c92f74