Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05a996a44f4fc1f…

MALICIOUS

PDF

71.6 KB Created: 2021-03-03 01:09:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0963c0fc54abc8b2403189532406bc2f SHA-1: 20b951f616542af0bf829b89bf29a9a7fbe13ceb SHA-256: a05a996a44f4fc1fba84ee3cc9850e4de103762b4a6aff739e9ffad876f8373a
186 Risk Score

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://ponafet.ru/award?keyword=the+witcher+3+guide+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411916/normal_5ff285b3247cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fd17d64075a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fdbd34549bd3.pdfIn PDF document text
    • http://help-service-support.com/can_defuse_bomb_csgo_sound8vnup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_60390b2902dcf.pdfIn PDF document text
    • https://xuxurebero.weebly.com/uploads/1/3/4/6/134673100/17300f48.pdfIn PDF document text
    • https://gazikurow.weebly.com/uploads/1/3/1/4/131452893/xerigevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_6024afa59426c.pdfIn PDF document text
    • https://xujesosa.weebly.com/uploads/1/3/6/0/136090165/sapolibipikanekulin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446017/normal_6020b8246c790.pdfIn PDF document text
    • https://xazunavawotop.weebly.com/uploads/1/3/4/7/134724639/talegavezi.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/sixon.pdfIn PDF document text
    • http://wiinorama.space/angry_ip_scanner_apkpure9qibf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484380/normal_6007d6f90fd98.pdfIn PDF document text
    • https://vuxemirisem.weebly.com/uploads/1/3/1/4/131453034/ebb60b9165912.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwifesatikebak.epizy.com/bdo_xbox_class_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 4984 bytes
SHA-256: e04eaee3f04a0a51a126ab3902235c590a5d1124b51318089cb561e8fef1471a
font_01_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 10836 bytes
SHA-256: 7d493aaa691476a293324a7b00de2e5a2746a0654f2304fff225bbc701886895

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