Malicious PDF — malware analysis report

Heuristics 7

• 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.
• 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.
• 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://xajibur.ru/123?utm_term=printable+ged+math+practice+worksheets PDF link annotation

  • https://cdn.sqhk.co/lakisitu/whfgdwz/20100082694.pdfIn PDF document text
  • https://static.s123-cdn-static.com/uploads/4495251/normal_5fe122c3e6777.pdfIn PDF document text
  • https://cdn.sqhk.co/fapewejav/b0ii2hd/solar_smash_online_game.pdfIn PDF document text
  • https://cdn.sqhk.co/bisadidizi/8hbjcMD/48491994986.pdfIn PDF document text
  • https://cdn.sqhk.co/nupumusu/hccjbIc/nuvunemonatakizimanetotob.pdfIn PDF document text
  • https://cdn.sqhk.co/pisimebuziz/jjjelhd/xuzewitefaluzigex.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4493282/normal_6023dd0281094.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4422908/normal_6016d0867c565.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4465018/normal_60205cd775315.pdfIn PDF document text
  • https://cdn.sqhk.co/tudobele/hhjhiB1/vector_full_game_download_for_free.pdfIn PDF document text
  • https://static.s123-cdn-static.com/uploads/4411935/normal_5fe28a81c4aa3.pdfIn PDF document text
  • https://cdn.sqhk.co/gibuburi/xichhja/rezinonedutuxasaxib.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • http://www.daltonmaag.com/In PDF document text
  • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_76cd6fcee2d5483f8bcc8741a9674987.pdf?index=trueIn PDF document text
  • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_501506b2dc3f43029ac06818afacb857.pdf?index=trueIn PDF document text
  • https://s3.amazonaws.com/tubupejevomo/after_effects_news_intro_free.pdfIn PDF document text
  • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_b332ad67edb1424fb83c4c0fd9d1e600.pdf?index=trueIn macro / runtime command snippet
  • https://s3.amazonaws.com/farokof/phyllo_sheets_samosa.pdfIn PDF document text
  • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_eca40f67727141fc86250494e3936902.pdf?index=trueIn PDF document text
  • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_4499d6a80eae46a195e6be5474563bd7.pdf?index=trueIn PDF document text
  • https://s3.amazonaws.com/selivuvumepaveb/xuware.pdfIn PDF document text
  • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_3670f84acf4e426b9135393b4fd146da.pdf?index=trueIn 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
  • https://s3.amazonaws.com/tubupejevomo/afIn macro / runtime command snippet
  • http://scripts.sil.org/OFLIn PDF document text

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