Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaf33d08cb9b719…

MALICIOUS

PDF

74.9 KB Created: 2021-03-05 15:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b27594123e2902c6b272ab0c09b8ec5d SHA-1: 9966353ec12a7085df5f32828df96ad757ef7a98 SHA-256: 7aaf33d08cb9b719d6810a5c24dcd901c9c618bfb908252f88662fb627e9f1ea
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'seumenha.ru' disguised as 'surfboard templates for sale'. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=surfboard+templates+for+sale PDF link annotation
    • http://islemleriniz.org/slader_algebra_1_common_core_pearsonyost9.pdfIn PDF document text
    • http://raisinshq.club/php_ecommerce_website_project_free_download7527d.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/Wjfhaif/home_design_paradise_life_dinheiro_infinito.pdfIn PDF document text
    • http://bestsaleshopin.xyz/82471587806xj75f.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/BZhhkhj/pew_pew_pew_song_official_video.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/jfigmif/awm_gun_ringtone_pubg.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/jhfE2gj/fizasowajajopipejawi.pdfIn PDF document text
    • http://cmb-accueil.com/the_drifters_white_christmas_sheet_musicbnnmf.pdfIn PDF document text
    • http://merogerofame.66ghz.com/biryani_hd_1080p_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/i8bAght/bolagubawazubufepiletu.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/hcntibF/management_information_systems_jobs_san_diego.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/ggUjaGt/tear_clothes_in_my_dream.pdfIn PDF document text
    • http://feyakast.online/jakodutukuzonukopexaxagudx1ghp.pdfIn PDF document text
    • http://wuwodijutorem.iblogger.org/time_inception_sheet_music_patrik_pietschmann.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/K9kXThg/xokazup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/volexulodunora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7153891-9167-4557-ba94-95b94c8c19f8/napijotidawazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c58e48-293f-4cbb-8fd6-1c761b3e4a1a/always_say_how_you_feel_quotes.pdfIn PDF document text
    • http://serepuzokoz.epizy.com/descargar_alien_vs_predator_extinction_para_android.pdfIn PDF document text
    • http://fakatidewejuna.epizy.com/cuales_son_los_signos_vitales_en_embarazadas.pdfIn PDF document text
    • http://wujaxon.rf.gd/fovizalu.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/lawukejizele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc451ef2-5546-4030-90df-353125a7bff2/libro_millonario_instantaneo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 5160 bytes
SHA-256: 717761140bafa86ee4153412c8d29573468547f547aac16b0406fab76702e1a3
font_01_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 10932 bytes
SHA-256: d8f657c582b99d6fc8ad72bb03d8e5928c29c3e008ddf64c30ca618ec241f92e
font_02_sfnt_off00010e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E78 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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