Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b04edcd649bb065…

MALICIOUS

PDF

85.7 KB Created: 2021-02-26 19:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 04f43986831a3b322208a15cf15ff9ce SHA-1: e0029cc86bb6a97c154e1142238f97cb8350c457 SHA-256: 9b04edcd649bb0651634032949f9b3587fc2e56379c74b13f3e1bf8c3e9c7417
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to external malicious sites.

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://fokemale.ru/strik?utm_term=how+to+train+your+dragon+3+art+book PDF link annotation
    • http://dekiweragaf.mywebcommunity.org/free_logo_making_software_download_for_pc.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/rain_bird_sprinkler_controller_installation.pdfIn PDF document text
    • http://fitness-ital.fun/fakiretevubilulonurilomg439w.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/nuclear_chemistry_half_life_problems_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_600a82faf1378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_60356d8e747a0.pdfIn PDF document text
    • http://alisabor.design/inkscape_vs_cricut_design_spacecyivu.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/y5ieJpt/global_lending_services_llc_reviews.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/what_proved_einsteins_theory_of_relativity_as_accurate_and_when.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/fefubetidutalipavu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5feb05fb8b6c0.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/wemo_maker_alexa.pdfIn PDF document text
    • https://cdn.sqhk.co/fejumoraw/5s8ChhM/truckcraft_truck_bodies.pdfIn PDF document text
    • http://kuvofejom.iblogger.org/aggiornamento_instagram_iphone.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/32456843357.pdfIn PDF document text
    • http://bonus332.site/adverbios_de_tiempo_en_ingles_ejerciciossf2a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372377/normal_5fe49a3bc0181.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomitad.epizy.com/21353411756.pdfIn PDF document text
    • http://liboditi.rf.gd/buy_bedsheet_online_singapore.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 5304 bytes
SHA-256: b4c291ba55981d12b87abffd473770a852a02bc73bf9316ec6bc392a4e964c10
font_01_sfnt_off00010a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 11292 bytes
SHA-256: 9bd22af6f3a0cbff3a36ae442e0f1860b5e62b76ab2c77dbd645dc6f101edccd
font_02_sfnt_off0001304e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304E 16528 bytes
SHA-256: 656cb35c9c0df06597d6fd81a63587387096b8d7e6b6cf805672fd162e44b6b9

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