Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f47be83109a461…

MALICIOUS

PDF

74.0 KB Created: 2021-02-15 03:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 81a72e89e566ce223102888bc93ac7c3 SHA-1: 917f3d29221ade8a3f992f31a583e059e149083c SHA-256: e6f47be83109a4619d203e18a0de2399c8be4781a819f3da0c9df8590b1e4fc0
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 0.9997

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://seumenha.ru/wix?keyword=averity+background+checks PDF link annotation
    • https://cdn.sqhk.co/desogepupema/aumqjdW/clash_of_stats_bot.pdfIn PDF document text
    • http://hamlikjorettoop.ru/the_game_master_network_channelpgoug.pdfIn PDF document text
    • http://precabinets.xyz/anomalias_congenitas_del_aparato_reproductor_femenino9vn8y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fcaa1872a990.pdfIn PDF document text
    • https://cdn.sqhk.co/keviwebewuta/ehgUuhj/hd_images_studio_background.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/hOaTBhQ/79275775405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_5fd5f0ced4571.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/c7Mjj82/67581485993.pdfIn PDF document text
    • http://padlamadla.site/introduction_to_philosophy_book56ars.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/NhiSpic/accurate_speedometer_digital_hud_gps_speedometer.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/ig2jeMN/38283632147.pdfIn PDF document text
    • http://martans.space/chips_movie_freew8vvi.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/khdifhc/love_artwork_new_york_quotes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_5ff5f6ffc9632.pdfIn PDF document text
    • http://gegejobusi.22web.org/descendants_1_script.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_60151ca70124e.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/YxTxUge/vasozugapejigexagilire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dobejul.epizy.com/ballena_orca_informacion.pdfIn PDF document text
    • http://luvewon.epizy.com/cv_format_for_sales_officer.pdfIn PDF document text
    • http://timarofata.epizy.com/html_link_stylesheet_async.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 5408 bytes
SHA-256: c0abc75d5f68639ecdf95c90cf711a7e881baf52afe1b066425bd4e6f4b2f6d2
font_01_sfnt_off0000ea48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 10116 bytes
SHA-256: c1509c7edf79fcc40af78b74dd71f48426973f8ebf073077e23c03efb7d241b8
font_02_sfnt_off00010cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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