Malicious PDF — malware analysis report

Static analysis result for SHA-256 984bee293b817f7a…

MALICIOUS

PDF

72.2 KB Created: 2021-03-22 08:19:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 783f0546fae0e008cc8ed07f59ba89f5 SHA-1: 17c5fbccba23bbb69411e8f2c4f379fa6b3b0bc0 SHA-256: 984bee293b817f7a64fee215fbd3dbc9fd1279656094e0ff26657c977a6616cc
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Ekonomi marxisme pdf' to direct users to these external sites. The presence of external URIs and the link farm heuristic indicate a likely attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

Heuristics 3

  • 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 https://xajibur.ru/award?keyword=ekonomi+marxisme+pdf
    • https://cdn-cms.f-static.net/uploads/4453344/normal_5fe7840c8fd9f.pdf
    • https://static.s123-cdn-static.com/uploads/4457005/normal_5fdd2fd146983.pdf
    • https://static.s123-cdn-static.com/uploads/4381551/normal_60072fbf28fc9.pdf
    • http://zuzorovix.scienceontheweb.net/what_is_the_role_of_the_teacher_in_a_montessori_classroom.pdf
    • http://mekomob.getenjoyment.net/gijivegutavuxejopes.pdf
    • http://raguvigawak.mypressonline.com/ccsf_fall_2020.pdf
    • http://watogoda.mypressonline.com/jowejobanugutoja.pdf
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/ramisiv.pdf
    • https://cdn-cms.f-static.net/uploads/4422163/normal_605679e510da9.pdf
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/nozekitegowuxedekawe.pdf
    • https://zewerigavuj.weebly.com/uploads/1/3/2/6/132681779/nuzasagunutovon.pdf
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/xidifobodevefapuwi.pdf
    • https://cdn-cms.f-static.net/uploads/4370078/normal_60468f071b117.pdf
    • https://polisurev.weebly.com/uploads/1/3/0/7/130740145/2778907.pdf
    • http://dilawiputonu.mypressonline.com/subway_menu_prices_california.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lomuper/kixoxovulifafuge.pdf
    • https://s3.amazonaws.com/takebemanijewok/laravel_5._5_blade_date_format.pdf
    • https://s3.amazonaws.com/nafoxuda/laying_vinyl_sheet_flooring_in_bathroom.pdf
    • https://s3.amazonaws.com/baxegezivumi/gurajada_apparao_books_free.pdf
    • https://s3.amazonaws.com/tawosutosuxi/what_is_the_synonym_of_tired.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110f3.bin
d1766ff3d6cffaae42dbe242fbd3e0674e8b51588dbf2537f9dd0fb786a1ccd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 5244 bytes

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