Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8829e8059b3920…

MALICIOUS

PDF

75.2 KB Created: 2021-02-19 00:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9e42f7a06717e8853e1759110d729818 SHA-1: 57b6c044d015437a9f44b39c15fc5e72bb92bf5f SHA-256: 4d8829e8059b3920caf369329548feb75af8497c458c8c0bf23e2130552ea2f2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links pointing to various domains, many of which appear to be disposable hosting. The primary purpose seems to be directing users to these external resources, potentially for SEO manipulation or to serve as a distribution point for further malware. The presence of multiple external URIs and the link farm heuristic strongly suggest a malicious intent to redirect users.

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://seumenha.ru/strik?utm_term=common+english+words+used+in+daily+life+with+malayalam+meaning PDF link annotation
    • http://prizinsta24.site/output_arcade_crack1c999.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/uJjcihJ/duxubudevujedawafu.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/ehagegg/big_win_basketball_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/likamigid/cBPIChg/razixeronawute.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/j6Yjdic/t_galleria_by_dfs_hawaii_honolulu_hi.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/ifgchc4/mobile_facebook_cover_photo_size.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/ajnIuie/restaurants_with_sunset_views_near_me.pdfIn PDF document text
    • http://retys.fun/brazil_team_logop2s56.pdfIn PDF document text
    • http://sodalabs.club/lagujimapozuvupisihsarl.pdfIn PDF document text
    • http://uscreditreport.info/glg_balanced_managed_fund_fact_sheetqb7qm.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/7c27ffdfbec1.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/gddgfoB/blend_it_3d_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/jahehbn/97055961374.pdfIn PDF document text
    • http://damita.fun/gukazanc50b.pdfIn PDF document text
    • http://anarchymedya.com/free_music_video_maker_appy7pu0.pdfIn PDF document text
    • https://cdn.sqhk.co/nurafurofopu/XgejjpC/cannot_login_game_center_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/iihblgi/67670175412.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/wjhaNT5/eclipse_edge_of_light_vr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88B 5420 bytes
SHA-256: 9ebb119fddc9e5d19e420dea89b99052eb88ff0e11c0f300f3d28702b6210f9b
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10772 bytes
SHA-256: ee2ab8d077886bcde0da9381ebe8ce51b11f1561359838b47a4bf425457fdf2d

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