Malicious PDF — malware analysis report

Heuristics 9

• 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.
• Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
  PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
• LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
  Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
• Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
  A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
• 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://jottigo.ru/strik?utm_term=how+to+change+battery+in+timex+digital+watch PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4454822/normal_602983d7d30bb.pdfIn PDF document text
  • https://cdn.sqhk.co/sirigibi/gdVhcid/exploration_mini_craft_apk.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4473963/normal_605b9b0b6327a.pdfIn PDF document text
  • http://securitycheckingbrowservkcom.xyz/download_learn_powershell_scripting_in_a_month_of_lunchesvpafe.pdfIn PDF document text
  • https://cdn.sqhk.co/nodezaneripe/wNhdWhh/28600328567.pdfIn macro / runtime command snippet
  • https://static.s123-cdn-static.com/uploads/4392453/normal_60048ebf412f1.pdfIn PDF document text
  • http://mavito.online/niposokukibewubixisozoxhok4.pdfIn PDF document text
  • https://cdn.sqhk.co/rowemarul/jpIrF2T/somasenuvolivet.pdfIn PDF document text
  • http://fatokopos.22web.org/disisobufufoludorini.pdfIn PDF document text
  • http://hargotel.xyz/lebebunilixarubevekokiga62xj.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4403948/normal_5fdc12d15c205.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_12225ba3f1b1496c9fae54bf23969a67.pdf?index=trueIn PDF document text
  • http://faxarase.rf.gd/como_se_dice_languidez_en_ingles.pdfIn PDF document text
  • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_abec647aa4ac4b249ad4ad2f78ccb7ff.pdf?index=trueIn PDF document text
  • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_d7df8755fd6a4a5f80ddde9522202de7.pdf?index=trueIn PDF document text
  • https://f3215690-35ba-4bce-915f-db1a6f912a1b.filesusr.com/ugd/d32599_d1345c8e4df2493b8c5d893b32a2a0bb.pdf?index=trueIn PDF document text
  • https://5e7fdb44-65a6-4d88-9b36-b69c04d36e08.filesusr.com/ugd/b547b4_62830d534dad4aed87703cad2bac194d.pdf?index=trueIn PDF document text
  • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_4b69832369974c1eab24a4c23658e144.pdf?index=trueIn PDF document text
  • http://kugaxupupoguj.rf.gd/retiwolati.pdfIn PDF document text
  • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_ff91699cf49243729da2ef455fd2adf2.pdf?index=trueIn PDF document text
  • http://zatafefot.rf.gd/attack_on_titan_game_pc_fenglee_download.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

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