Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f90be429b5ffcbd…

MALICIOUS

PDF

77.2 KB Created: 2021-03-04 04:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 78605205d1a6a192f4cc01ceb6850bb4 SHA-1: 105e1a06cebbe1a136cffb36f6457220526664b3 SHA-256: 0f90be429b5ffcbdffa78bf9ff722abe3c1dd7f9ac44838ae5996c4afe433173
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically identified as a link farm hosted on disposable infrastructure. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/award?keyword=what+are+some+examples+of+organizational+culture PDF link annotation
    • http://forajadafogaxuv.medianewsonline.com/how_many_episodes_are_there_of_defending_jacob_on_apple_tv.pdfIn PDF document text
    • http://bigwin-1xbet.fun/hydrochloric_acid_safety_data_sheet_uk517ux.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupiba/ieuijrv/musica_italiana_web_radio.pdfIn PDF document text
    • http://mowuvivof.22web.org/ben_10_protector_of_earth_100mb.pdfIn PDF document text
    • http://timinome.getenjoyment.net/raxosonopinewawas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5fd6aeeb4fa8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fe8a806f3fa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445749/normal_5ffb3ac22f7b2.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/big_data_analytics_salary.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/how_to_reset_filter_on_trane_thermostat.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/where_to.donate_used_toys_near_me.pdfIn PDF document text
    • http://winoraama.website/suddenly_became_a_princess_one_day_novelm89wy.pdfIn PDF document text
    • http://agent-spv.space/tarogevomizukedipxkduc.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuvobu/hhYigjf/carnivores_dinosaur_hunter_pc_game_download.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/03.06_employment_and_occupations_writing_assignment_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_60243524e1ca1.pdfIn PDF document text
    • http://vsspb.ru/standard_form_vertex_form_and_factored_form_worksheetm99i6.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/bebgdsH/zetunituripejoravagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temekem.epizy.com/3771784920.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/cooked_bow_tie_pasta_nutrition_facts.pdfIn PDF document text
    • http://pikididubemet.epizy.com/apollo_clinic_medical_reports_online.pdfIn PDF document text
    • http://xanalun.rf.gd/72012930018.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/crochet_patterns_for_granny_square_sweaters.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_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 5560 bytes
SHA-256: 284fa50e4294174996e19f690c51f90bebf90f803d68488773208c4da9d62e60
font_01_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 10048 bytes
SHA-256: 64500d3f4899d97bc48b13f5e201d8cdc1e3eada959fa4a64b8d1e4aecb861b3

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