Malicious PDF — malware analysis report

Static analysis result for SHA-256 73773def60273b32…

MALICIOUS

PDF

70.5 KB Created: 2021-02-26 23:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aafd30c45db1d90f595d6bf6feef3763 SHA-1: d99b7d73dd5b97f474040b3733b78d805a61f628 SHA-256: 73773def60273b32970f960344ecbd6f8aea03a3a6ce7170c4efad91a139a86a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=solving+simple+equations+using+multiplication+or+division+worksheets PDF link annotation
    • http://fefiwizam.sportsontheweb.net/escuelas_contemporaneas_de_la_psicologia.pdfIn PDF document text
    • http://lastasked.com/baby_shower_sheet_cake_ideas_boymn6ou.pdfIn PDF document text
    • https://begosibaluta.weebly.com/uploads/1/3/0/7/130775163/954f425b6d.pdfIn PDF document text
    • https://wazumiwu.weebly.com/uploads/1/3/6/0/136038811/dasodis_tetanijaxokadiz_zuluzusi.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/goroge-sunedi.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/dea7f7bc5.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/mojeluruzesovaribonegexu.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/dc9eaffa270ffd.pdfIn PDF document text
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/8907894.pdfIn PDF document text
    • http://imedo.ru/92762884850avhph.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416506/normal_5fe0dc45a9c3d.pdfIn PDF document text
    • https://valetapos.weebly.com/uploads/1/3/4/2/134265584/3366220.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/duvawikasowaletixefafobum.pdfIn PDF document text
    • http://natorg.fun/maxwell_s_equations_in_word_formb04v0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_6008de6fcdeac.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/1121520.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/9846187716.pdfIn PDF document text
    • https://pinuxijevafu.weebly.com/uploads/1/3/4/6/134608025/rexeso_bisunelebipu_palini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fd16a0f82cce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogalibamadom.myartsonline.com/gerizusogufezowasevo.pdfIn PDF document text
    • http://pititonekeget.epizy.com/43719613872.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_off0000d38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38E 5932 bytes
SHA-256: 893326e17fa49024358e26a41e9e25696136463ccd36584496e46e669d4944c2
font_01_sfnt_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 10628 bytes
SHA-256: 2cef35b158077660d121af7871fd1027d1c0cc9da1e644ed833cd687cdd634d8

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