Malicious PDF — malware analysis report

Static analysis result for SHA-256 991948f68432a4e5…

MALICIOUS

PDF

77.4 KB Created: 2021-03-19 12:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e3fabf835ce5fa9dd1ed3c75bdeaec70 SHA-1: 00b6a2441e9071d85f47e8e21679496ef29b1293 SHA-256: 991948f68432a4e5f13f793fc4953d0d060d54a422de01c4bc10d6ba2ac1a460
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains keywords related to cheat engines, suggesting a lure for potentially unwanted or malicious software. The presence of numerous external URIs, particularly the one pointing to 'midufefew.ru', strongly suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://midufefew.ru/wix?keyword=asphalt+xtreme+cheat+engine+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384472/normal_5fee644fedc3d.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/19856036697t963j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421637/normal_5feddbfe022d5.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/5Y76igz/lego_batman_dc_super_heroes_unite.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jhf0iej/knives_out_battle_royale_download.pdfIn PDF document text
    • http://ilmahli.com/libros_de_redes_de_computadorasnoo9p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_6041392147769.pdfIn PDF document text
    • http://igme.site/43279493659ncssm.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/jilajetip-boluxuvugugi-jugiza-sirinopisofepe.pdfIn PDF document text
    • https://jabevemejo.weebly.com/uploads/1/3/1/4/131483275/fozolukuje.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/gK2lIXz/wazekarivosog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386621/normal_5ff20e7a99476.pdfIn PDF document text
    • http://tewajaz.iblogger.org/binosakigutiti.pdfIn PDF document text
    • http://bridgecommerce.com/15462241778f69m4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_5fd2dd0bbf4e3.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/iiijc4A/nowipexova.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/zGqAhjK/tutedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bomigezi.epizy.com/string._format_iformatprovider_example.pdfIn PDF document text
    • http://juvotam.rf.gd/bepekilag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb4fca2-b6b7-4d4b-a25d-5e6e797f8f31/nyssma_manual_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8100ac-0543-4b2c-9258-259fedb23fa2/remakuwan.pdfIn PDF document text
    • http://dufofaj.epizy.com/nix_advance_8_inch_usb_digital_photo_frame_widescreen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53e61d5-2ccd-4b3a-9a2d-a8f107cac12c/xokikigeloboneneboki.pdfIn PDF document text
    • http://lusiromipu.epizy.com/que_es_la_depresion_psicologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480310ad-2381-4ad8-b23c-c636af6bb3a4/what_is_the_fastest_way_to_cure_chilblains.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_off0000edcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 5832 bytes
SHA-256: 981c6ca1ae1d5e6263983665e153cf17b6592517091a5070d4df7558cf07391a
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 11264 bytes
SHA-256: a9aaf10bbc4c23d3f4bb0bcacc6df10b4b3fd9c240afa9d275c7bc457b010bdb