Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5639fc771992b6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-02 23:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ddcdb392c4561664c3e796b6330b3ab0 SHA-1: ac8ee15448511990c336b41f3a29b76f14238c3e SHA-256: 4e5639fc771992b647c25cb2e3b67df94b4ba9fc5151f6037a6b8374bd297456
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://vilenefex.ru/wix?keyword=triangle+congruence+worksheet+asa+and+aas PDF link annotation
    • https://lutibaviw.weebly.com/uploads/1/3/4/6/134669369/d4e7ce689.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/is_season_4_of_tokyo_ghoul_on_hulu.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/7200785.pdfIn PDF document text
    • https://filojekejo.weebly.com/uploads/1/3/4/4/134446685/7856119.pdfIn PDF document text
    • https://cdn.sqhk.co/rujopupomob/Khgig7M/fanorar.pdfIn PDF document text
    • https://roxodebovak.weebly.com/uploads/1/3/1/4/131454305/wupomased.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/gjaiigd/79746251669.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/relonawixalu.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/lomemilaninudedag.pdfIn PDF document text
    • https://xubedemowixur.weebly.com/uploads/1/3/6/0/136004279/821e58a55c8.pdfIn PDF document text
    • https://cdn.sqhk.co/reserujaj/EkhgZHX/75058460240.pdfIn PDF document text
    • http://pulaketuwogeza.22web.org/oxigenoterapia_minsal.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/80321004e7d7.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/ihgcjhB/satiweparefopapaxigapigut.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/ms_access_2007_query_tutorial_ppt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibowaloboko.rf.gd/google_sites_new_templates.pdfIn PDF document text
    • http://tiriburud.rf.gd/ccna_2_chapter_4_exam_answers.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_off0000e257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE257 5308 bytes
SHA-256: e2efb5b6b2d04cae58278d3be19470acb06ecaa91f23214ff9ad4c89b883d06f
font_01_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 10024 bytes
SHA-256: 951558381202f77d37321df3ec7276778fc23edc8d3e1379b348d4061ad93600

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