Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bebad876386f321…

MALICIOUS

PDF

83.3 KB Created: 2021-04-03 10:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0feb92d397d2a961406e4edc4b0933cd SHA-1: 287cdd25b77ff8b2839c2d665f57efb674726d5d SHA-256: 1bebad876386f3219964dca556c6b7aa2dcba795f5e6d20dc97b5444706c1ee7
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to various domains, many of which are associated with disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=what+are+the+four+critical+lenses PDF link annotation
    • http://pifemukopisare.sportsontheweb.net/61838425312.pdfIn PDF document text
    • http://azorocheat5.xyz/interstellar_piano_sheet_music_staygjlp4.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/pharmacology_and_the_nursing_process_free4madf.pdfIn PDF document text
    • http://googsnat.space/driver_easy_pro_key_list9dm6s.pdfIn PDF document text
    • http://doordash.link/avalon_pellet_stove_partsxhjly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_5fdc6c6c7c0e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5ffdb0be37026.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/87785634879.pdfIn PDF document text
    • http://usechambre.xyz/activator_office_2016_professional_plusy26ip.pdfIn PDF document text
    • http://my-favshopf.online/damon_ps2_bios_apk_download6gooa.pdfIn PDF document text
    • http://raisinsapp.pro/hp_officejet_pro_8500a_print_quality_problemsg78ol.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/29109098839.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/lexexedujuxkma1t.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/fufikunaxisexadi.pdfIn PDF document text
    • http://magic-spring.com/mountain_sniper_shooting_game_download_apkhny8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_6022f529979b4.pdfIn PDF document text
    • http://white-x.fun/how_to_set_up_jitterbug_smart2tw6hs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3081ff2-fb44-4dd8-9da1-763754d9130e/paragraph_editing_worksheets_grade_6.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/79311692588.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/the_undercover_economist_ebook.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/sixty_stories_by_donald_barthelme.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/what_is_the_best_drawing_app_for_windows_10.pdfIn PDF document text
    • http://xirofapinowud.atwebpages.com/lineman_and_cableman_handbook_13th_edition_free_download.pdfIn PDF document text
    • http://gototura.myartsonline.com/k_means_clustering_in_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44272dbd-393a-4794-9297-d749a3c6eeff/dell_latitude_e6530_datenblatt.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_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 4980 bytes
SHA-256: 74852812bdac3594d1a0953df63f4bae51430c8089fab47843c3b20d97d6dfa8
font_01_sfnt_off00011b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8A 10620 bytes
SHA-256: ca40b19f8fddf43b2fc492c61107d0e36cdb80dc5c39d6a6b22612b1ca4959cd