Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d21d6f2c14444d2…

MALICIOUS

PDF

91.9 KB Created: 2021-04-19 15:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a7a34efcf7642e9ba89acf49cea999c SHA-1: 7da52cf5f9fe8ab2a86901f41921011fb13a7861 SHA-256: 4d21d6f2c14444d2ef5a578da9557bab1109abd256f85c58103a09dd991656ec
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that leads to a domain associated with malicious activity, disguised as nutritional information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=arby%2527s+gyro+meat+nutrition
    • http://ru-dev.xyz/rebosisugt83p3.pdf
    • https://cdn.sqhk.co/gefimiwotux/aiaiWQm/amazing_adventure_run_3d_game_download.pdf
    • http://xopiredat.22web.org/python_interview_questions_for_freshers.pdf
    • https://cdn.sqhk.co/nejisakatok/HOKMjd0/texas_holdem_poker_offline_android.pdf
    • http://gagarinski.su/cuantos_metros_mide_un_metro_cuadrado90kzc.pdf
    • http://cosmosqrab.online/magic_bullet_kitchen_express_vs_ninja03a32.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tedowafomaru/director_de_alimentos_y_bebidas_definicion.pdf
    • https://uploads.strikinglycdn.com/files/a26b8a32-7206-4500-a357-29f3b6e75b45/prevention_through_design_history.pdf
    • http://jojisoxig.epizy.com/5970817730.pdf
    • https://uploads.strikinglycdn.com/files/40461a69-ae5f-4102-85c3-3d9cc8de8234/43727772195.pdf
    • https://uploads.strikinglycdn.com/files/03887a48-97cd-43e9-9ba7-bec594e20b81/gobogagefowugokugulesuda.pdf
    • https://uploads.strikinglycdn.com/files/4176f7a4-81c6-40a1-96c6-71ec029492cc/ratupivezakutajebolepexez.pdf
    • http://texatopewewew.epizy.com/chessbase_light_free.pdf
    • https://uploads.strikinglycdn.com/files/c3d9c632-4464-4981-8fe4-330bfe345cd8/a_2.4105kg_airplane_is_cruising_at_900_km_h.pdf
    • http://sulanulug.epizy.com/16673193220.pdf
    • https://s3.amazonaws.com/rekawexuretowo/burnout_car_games_free.pdf
    • https://uploads.strikinglycdn.com/files/d01795dc-c7dd-4ce9-9796-2435bfebb435/what_movie_has_the_song_power_of_love.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_off0001287a.bin
01142cb94440c0cb57fef6aa31c2d888e41999f9d6341e6d3126bc1231a5416e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1287A 5240 bytes
font_01_sfnt_off00013a43.bin
7efd6e02e67bfffdfdb669d1a6a83ac12fac78ff1941c6ff3d757f48111dd6ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A43 11904 bytes