Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a79b202d2eece22…

MALICIOUS

PDF

84.8 KB Created: 2021-06-10 15:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1b5a1d97c4b1db7ba133bdd811aabff2 SHA-1: 50fc261e788b7ddc351a6c34202113f072729cec SHA-256: 6a79b202d2eece226e74b42836f55c7bb33f249c2e4c241b3cdd211d863fdcde
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document contains numerous external URIs, including one pointing to 'kuzutuzo.ru', which is likely part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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/123?utm_term=counter+strike+global+offensive++free+warzone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fffcf5171e84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_600015388a451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fdd227982754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_60113a3d83472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_600a4c9a8ec87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paditoxef.pbworks.com/f/what_is_succession_planning_in_hrm.pdfIn PDF document text
    • http://vakerul.pbworks.com/f/vamaliwedimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6668fd02-a1c2-4f8a-9c77-3a7bcd7526e2/who_teaches_potions_in_harry_potter.pdfIn PDF document text
    • http://redejok.pbworks.com/w/file/fetch/144530040/ejercicios_de_sucesion_numerica_para_tercer_grado_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba335cfe-c3f6-4537-87d1-2b67eff11001/why_does_my_back_hurt_when_i_look_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa81acdb-2f1d-4536-8603-d2a2b30ffdf6/m-audio_fast_track_drivers_mac_catalina.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144809520/15005766954.pdfIn PDF document text
    • http://vowijeve.pbworks.com/w/file/fetch/144836727/the_lion_the_witch_and_the_wardrobe_summary_chapter_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0cebb5-6181-4bf1-85d2-2643d7b178b1/can_you_use_just_for_me_texture_softener_on_color_treated_hair.pdfIn PDF document text
    • http://vuvikix.pbworks.com/w/file/fetch/145055034/35769818946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3402f46d-64c4-4e7a-800b-32c704b7d8dc/is_cloud_atlas_good.pdfIn PDF document text
    • http://disisopaz.pbworks.com/w/file/fetch/144659370/21413798535.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/93801332902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1ced44-95dc-4911-b268-0a04c1ad6166/stock_market_news_today_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b4120e-2c5e-40ef-b100-75090dff8633/paragon_digital_defrost_timer_wiring_diagram.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/89824504584.pdfIn PDF document text
    • http://ganosidil.pbworks.com/w/file/fetch/144982062/secret_neighbor_apk_download_android.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144424515/8937322884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37ab27e-afae-416a-868a-cfc6fa39cae6/gmat_official_guide_bundle_2019.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144697704/49368000560.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144427770/what_is_the_function_of_benthic_zone.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_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 5248 bytes
SHA-256: c1572bcaed33eff5bfbc967926ceeb982b8c0979940f8425d8b512a0fc7b1a97
font_01_sfnt_off00011caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAA 12056 bytes
SHA-256: eebbb1de28146e236434ea01e414ce0da4241a8a5cf9fb667eeccf202a18fd44

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