Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee8e563331002c3…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 00:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3032c5f1b126a7fded0fffd677ec1383 SHA-1: 143d7e38ddaedb58cc8c4f20954accccb548ab8e SHA-256: 6ee8e563331002c3a09e2645dff5937db109f9bd42b8d21ae46dd67ef26f3e7b
186 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 ClamAV and 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/wix?keyword=adachi+social+link+6 PDF link annotation
    • http://100p-f.ru/wizard_character_sheet_5eev6u6.pdfIn PDF document text
    • https://lujututuvaribo.weebly.com/uploads/1/3/4/3/134339905/13e2881.pdfIn PDF document text
    • http://grigolia-studio.ru/nuzunonanenexojanenex1nglv.pdfIn PDF document text
    • http://fc-aromat.ru/dungeon_fighter_online_anime_episode_3bxoia.pdfIn PDF document text
    • https://sebumowuvuxeluz.weebly.com/uploads/1/3/5/9/135962316/nulisux-tofivukuxixesu-xetomuke.pdfIn PDF document text
    • http://optalpha.com/poxupux7m0.pdfIn PDF document text
    • http://vknart.xyz/19873304401rpbfl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_6ca71835a7724f8a9154b3354a0e6bc0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fbdb26-7034-49f0-a34d-8c07c017abe8/11378122176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5585959b-336b-4a1c-b721-fc687fe249d3/how_long_do_dyson_rechargeable_batteries_last.pdfIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_649a31333a394243930aaa5133283106.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef19a091-9314-46c5-8d7b-51a6a3dbba8f/74904265872.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_7a0f7c10d122439f82cb879debb6516a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99c7621-0370-4ec1-8038-84ba9a283fd4/wonesomipebixudax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6725ca8-d083-4d7a-9523-750158d01390/ejemplos_de_obligaciones_en_titulos_de_credito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f033fd-2d13-40b2-b747-7e0e549d5e75/amelia_bedelia_books_level_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b30b8e-0379-45bb-ae41-42ebc566ebac/23984321934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e0b2a5-c2e6-473f-b258-bb6ce5546c39/life_after_life_raymond_moody_summary.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_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 5140 bytes
SHA-256: 79cfeeb5610ee45e5af1c079b36dfcd02694083cc45d27863c8c0d2e76384209
font_01_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 11100 bytes
SHA-256: 73ab7091b27e4f97c445e8c9696cf9f9fd624020717b6e9acc7a3d064e7373db

Open this report in the interactive analyzer, or submit your own file for analysis.