Malicious PDF — malware analysis report

Static analysis result for SHA-256 2223be5382ef1eee…

MALICIOUS

PDF

75.1 KB Created: 2021-03-29 05:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76df2a094413b85e544175fec7ce2785 SHA-1: 7b71176e7e0d31bf4b676fdfe2e7e2d187abf39d SHA-256: 2223be5382ef1eee36c8d78284cca044ae45f5e6370083f456dc7b559d08f8d0
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'medical certificate format for student pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a malicious intent to redirect users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=medical+certificate+format+for+student+pdf
    • http://rabiwitijif.medianewsonline.com/understanding_automotive_electronics_5th_edition_free_download.pdf
    • http://xajabuzowa.scienceontheweb.net/taller_alimentacion_saludable.pdf
    • http://kogowetek.getenjoyment.net/3038417420.pdf
    • http://paxenazubenib.mygamesonline.org/difference_between_center_of_mass_and_center_of_gravity.pdf
    • http://jaxifas.getenjoyment.net/how_to_make_viking_axe.pdf
    • https://kifezitiwiwafu.weebly.com/uploads/1/3/5/4/135400929/tijebufexogugog_lipolumorod_zoziguvekugopo.pdf
    • http://pazujiz.mygamesonline.org/34286299312.pdf
    • http://fanisore.sportsontheweb.net/who_was_the_first_person_to_view_the_walls_of_the_cellar.pdf
    • http://bikejesoxatelo.mygamesonline.org/application_of_forensic_anthropology.pdf
    • https://rorukelezoreke.weebly.com/uploads/1/3/4/4/134460248/metugebekedexad.pdf
    • http://medilawibume.scienceontheweb.net/lowajir.pdf
    • http://majelogajizivo.iblogger.org/baofeng_uv-_5r_operating_manual.pdf
    • https://zajinepimasi.weebly.com/uploads/1/3/2/8/132815118/sukagemapivudinamime.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c91d3cb2-12ca-4551-af71-74a36e4095d3/dakerinete.pdf
    • http://mikijanux.atwebpages.com/giparu.pdf
    • http://xolevusafo.myartsonline.com/16874407155.pdf
    • https://uploads.strikinglycdn.com/files/7f69cdcb-83c7-49c4-b42d-5384bd44f98a/qu_significa_cada_bolita_que_tiene_un_rosario.pdf
    • http://tavudedenudisuj.epizy.com/what_does_the_doll_house_symbolize_in_a_dolls_house.pdf
    • http://zezofakarol.myartsonline.com/what_are_the_purpose_of_technical_report_writing.pdf
    • http://sopavame.onlinewebshop.net/furedozi.pdf
    • http://ludugatitabi.atwebpages.com/57888426860.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56f.bin
0042d040516caab79b41e0dcb6996993499ffc8c4955c4fab370bf939d5fef9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 5304 bytes
font_01_sfnt_off0000f76c.bin
631d0f895fa1cf7c800191ab8cf2cb92a31d6b6473c4b642ca17e14265c35307		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 11140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.