Malicious PDF — malware analysis report

Static analysis result for SHA-256 f917801f7efe65d3…

MALICIOUS

PDF

71.0 KB Created: 2021-03-23 01:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 72b0b054a5d837b1a8c69185669c2ea9 SHA-1: 29405aa99d82457ff63fb8eb9e28d2d95cf5fbde SHA-256: f917801f7efe65d312e80ca00c2736ee8ab27d40479646a1edbc3036915f536a
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://lozipotod.ru/wix?keyword=eztv+proxy+february+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454299/normal_60582f491be41.pdfIn PDF document text
    • http://nosinoski.shop/boy_scout_personal_management_merit_badge_bookrfh66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5fe6d15c69aa8.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/vuderenapowa.pdfIn PDF document text
    • http://zujoxuxosaja.getenjoyment.net/foxpdf_coreldraw_cdr_to_converter.pdfIn PDF document text
    • http://brumbum3.xyz/xakozizok5ctd8.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/es_mejor_comer_despues_de_hacer_ejercicio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_605536741bd3f.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/saxomilibu.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/how_do_i_reset_my_funlux_camera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/5560194534.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/23103860776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183e3ea1-4a81-462f-97cb-56a5ee79e79f/13310030268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b1a738-fbf7-464c-bcb0-c999f26c2b99/60800648514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5b011a-5aa7-4401-b11b-5a5d48d82938/how_to_install_nuance_dragon_naturallyspeaking_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b55ea8f-27dc-46f6-8d80-89575c1af7e7/spectrum_tv_remote_control_not_working_how_to_fix.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/ribapapixezexumumoluwezev.pdfIn PDF document text
    • http://xufoziminep.onlinewebshop.net/sovavawekakexeviwasexow.pdfIn PDF document text
    • http://famekuputoda.myartsonline.com/38045366843.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 5336 bytes
SHA-256: 40481ab4ce37ad31faa95f9ee7212aa4545c8a6d1abe43fda29faf5c00b6030c
font_01_sfnt_off0000e974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 11012 bytes
SHA-256: 4ce290015da5bb07a884b1d3de610fd6fdf60f41206de35dbf5427448ab7eefa

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