Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc6e45a842f5db9…

MALICIOUS

PDF

70.8 KB Created: 2021-04-01 11:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0678b3940bbd8cfd25f0b419b05eec0e SHA-1: ba6b227205fb3d97ffa397db4712e8630da1d612 SHA-256: bbc6e45a842f5db94eee2687454031409a5fcde7c7f58dfec23c0361db8ce17e
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to distribute links across low-reputation domains. The presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

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://vilenefex.ru/strik?utm_term=2015+harley+davidson+touring+service+manual
    • http://pixunune.sportsontheweb.net/clash_of_kings_pov_chapters.pdf
    • http://kazexajisodibu.medianewsonline.com/55664017546.pdf
    • http://pet-guru.shop/ruludifikadanqcr3.pdf
    • http://tuwukadinem.mygamesonline.org/kho_kho_game_score_sheet.pdf
    • http://vexetifiridik.mypressonline.com/how_to_analyse_a_graph_in_english.pdf
    • https://cdn.sqhk.co/pulovafafita/gjjeDvO/ruforurize.pdf
    • http://pixunune.sportsontheweb.net/accounting_learning_book.pdf
    • http://supusatode.sportsontheweb.net/45950415433.pdf
    • https://cdn.sqhk.co/radofufalam/DTkF8ib/final_fantasy_crystal_chronicles_remastered_physical_copy_english.pdf
    • http://tijudiwulewanuw.getenjoyment.net/98111215154.pdf
    • https://cdn.sqhk.co/kugorazig/iaPicih/boloranuwe.pdf
    • http://damvglaz1.xyz/zijazoxube5rhs3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zexaxekiki.atwebpages.com/canada_pension_plan_application_form.pdf
    • http://nibubatovavav.atwebpages.com/tout_savoir_sur_l_agronomie.pdf
    • https://uploads.strikinglycdn.com/files/d9525336-b52d-4387-838f-b94151feb57d/16514301838.pdf
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_9404bde3574945bd90c788d873571284.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb570d32-a5a4-411a-9c91-2ba630a6c189/23062917137.pdf
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_fc8bd68b12f647bf83fe40f292cd418d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d354.bin
ce39b3d40abe21ca004cf885de33ce370a2b4b55d069fe699edca85964cf2e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 5872 bytes
font_01_sfnt_off0000e73c.bin
ae2653afdc94a73dac654b9dae602bcfe205593e0379e65e98ac33b3b9c44d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE73C 11536 bytes

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