Malicious PDF — malware analysis report

Static analysis result for SHA-256 5507a2a4765cc272…

MALICIOUS

PDF

77.6 KB Created: 2021-04-03 23:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b5e778ba16f7005c06e172a0ee275ac SHA-1: e75fe273c7eff034430499504ea2412303f88ee5 SHA-256: 5507a2a4765cc27269c6c76378dbe76381a72e53ee4c426b38ec3a1f539289a2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains keywords related to the URI, suggesting a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/aws?utm_term=wildgame+innovations+sd+card+reader+vu60
    • http://raxejudesezix.scienceontheweb.net/how_to_clean_inside_of_microwave_convection_oven.pdf
    • http://xapiduxirob.mywebcommunity.org/cbse_class_12_date_sheet_2020_science_stream.pdf
    • http://rufemonavubut.22web.org/61797912664.pdf
    • http://xuzofukajomemu.iblogger.org/pizefigatibu.pdf
    • http://famozosivupiwij.sportsontheweb.net/manual_de_organizacin_y_funciones_de_una_empresa_comercial.pdf
    • https://cdn.sqhk.co/fusozuwalas/chiNibH/mini_basketball_goal_for_room.pdf
    • https://cdn.sqhk.co/gapevusa/yANqvhh/best_free_music_creator_app_for_android.pdf
    • https://cdn.sqhk.co/kutajanode/Uigjt2x/43668325070.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nupuzawov.onlinewebshop.net/bovadevogenesurasida.pdf
    • http://zisukuvi.atwebpages.com/vamuwojorad.pdf
    • https://uploads.strikinglycdn.com/files/429bf5b7-76a1-433e-8e8b-5c9bee396db4/coping_cat_workbook_free.pdf
    • https://uploads.strikinglycdn.com/files/dad5b7e5-bccf-4fc0-a71a-f42fb6598d04/similar_polygons_geometry_worksheet_answers.pdf
    • http://jemileti.atwebpages.com/epidemiologia_medronho_download.pdf
    • https://uploads.strikinglycdn.com/files/2455a08f-84e8-46fc-beea-a46b0a1c84e8/lukuge.pdf
    • http://tudixuzaw.onlinewebshop.net/download_kaligrafi_asmaul_husna.pdf
    • http://tojopoxirer.rf.gd/26161458963.pdf
    • http://binuwuzipu.myartsonline.com/79346996177.pdf
    • https://uploads.strikinglycdn.com/files/f4717fce-117c-492a-9b15-7151b0aefa6e/chick_fil_a_100.pdf
    • http://romakilax.myartsonline.com/31552087517.pdf
    • http://lokakowevokeb.epizy.com/ford_mustang_ecoboost_fuel_economy.pdf
    • http://fuwotimusajitos.rf.gd/headless_horseman_hearthstone_guide.pdf
    • https://uploads.strikinglycdn.com/files/e667f677-9c93-41fa-86d5-3cef370efc23/gazejasedexumapedujowo.pdf
    • https://uploads.strikinglycdn.com/files/9bc15192-eeec-4375-907e-b7c44b16afeb/89364534879.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_off0000ecac.bin
6a2bc270be4bb6b48f91eda2c1a9396f9f7bba5cd61e279f4d6c98614f3a0252		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 5628 bytes
font_01_sfnt_off0000ffca.bin
2269330a06ccea3fa61082cc69c08c96a41e08552ae5f51cf95c9f9c4110c553		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 12348 bytes

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