Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa75d760d3370a8…

MALICIOUS

PDF

82.4 KB Created: 2021-02-26 12:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b07f401569e5df2e70c991a7f2cfed6 SHA-1: 644ef0f725d8c10b1c33a24c651775a6f887a644 SHA-256: 8aa75d760d3370a81f3ccf335a1cd9a51fcf8d554d3e6d4e634fefd7ab425fa1
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs pointing to disposable hosting and potentially malicious domains, indicating a phishing or malware distribution attempt. The PDF structure and embedded URIs suggest it is designed to redirect users to external content, likely to download further payloads or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=monsters+inc+characters+roz PDF link annotation
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/xuxufanur-setukib-sesunefefarabit-nomikisit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_5fd0bdcb434cf.pdfIn PDF document text
    • https://mokufanogokotim.weebly.com/uploads/1/3/1/4/131406807/8945857.pdfIn PDF document text
    • http://vizit.store/cask_of_amontillado_analysis_essaynh02p.pdfIn PDF document text
    • http://vawafaxas.iblogger.org/05_jeep_grand_cherokee_5.7_hemi_mpg.pdfIn PDF document text
    • https://daguvosiliwu.weebly.com/uploads/1/3/1/4/131406153/muwezowegodirut-mororoz-buwow-nodilugutawabix.pdfIn PDF document text
    • https://cdn.sqhk.co/xatuxazaz/hhe9Put/ghost_town_adventures_mystery_riddles_game.pdfIn PDF document text
    • https://xatotowo.weebly.com/uploads/1/3/2/7/132740458/bf876a2bbc6d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_600a4d245c171.pdfIn PDF document text
    • http://alisaborodaenko.design/python_format_sql_statement42l0n.pdfIn PDF document text
    • http://6gusevshop.space/32646974780kd9c7.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/9o3xug8/soxagefut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465262/normal_602e0df31b00d.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/mihgijm/miwages.pdfIn PDF document text
    • http://opendouche.xyz/how_gears_work_on_road_bikesy8kc.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/mho1ihx/migorokeja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zataweluj.epizy.com/vinimigugumun.pdfIn PDF document text
    • http://wokesoz.epizy.com/brays_school_tile_cross_uniform.pdfIn PDF document text
    • http://bovamiwojilonem.epizy.com/baadshaho_audio_naa_songs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 4912 bytes
SHA-256: ce5d70e14bc64d1068b9615d7ab432aef90e13766e97188cf21093bc804bf688
font_01_sfnt_off000101b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 11204 bytes
SHA-256: 950f71faa06ae8b6ed8bb21237e1c2302f0a75704e14126be8d8eb886f05c8a7
font_02_sfnt_off00012786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12786 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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