Malicious PDF — malware analysis report

Static analysis result for SHA-256 4415405a29106c9e…

MALICIOUS

PDF

68.9 KB Created: 2021-03-01 19:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5ba389473b9683e3789e7b33757c538b SHA-1: cfeafd11ea6c5cb97d56dcdb333b3cd8f2a1596b SHA-256: 4415405a29106c9e7a5d69a91f9a1d53e09e13941fe8ec8ae99bf65f9226f8cd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with a primary focus on directing users to 'xezojetit.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to obscure the true destination or host multiple phishing/malware sites. The ML classifier and ClamAV detection strongly indicate malicious content, likely phishing or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=how+to+disassemble+a+zebco+33+fishing+reel PDF link annotation
    • http://likedizar.medianewsonline.com/zakamenexavirisurukuteb.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/25461255876.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/basic_english_worksheets_ks3_uk.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/what_are_the_5_forms_of_prayer.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/yashica_minister_d_repair_manual.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/fokanepixugopepif.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/38055387567.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/badger_insinkerator_15ss_3_4_hp.pdfIn PDF document text
    • https://cdn.sqhk.co/kamugututu/gHBgcjf/luzumakenesiwagasa.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/lerafekirujimekokij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radiviwix.onlinewebshop.net/estructura_de_un_texto_expositivo.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/film_bajaj_bajuri_the_movie_720p.pdfIn PDF document text
    • http://segimoto.myartsonline.com/jeep_tj_replacement_body_parts.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/the_merchant_of_venice_bassanio_character_analysis.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/85690069600.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/vejumozibisum.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/blackshot_hack_dll.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/packaging_dieline_templates.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_off0000cf57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF57 5844 bytes
SHA-256: 5472ca0335bb5a7a548cde38d8016c64dad20a9c4b869d3b2fb999eac1f6bf18
font_01_sfnt_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 10420 bytes
SHA-256: 2cf8f393e64c4d95f4229aa2760554d4b4d80d400d1c6012e7ed23dde933978d

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