Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc951726b363d7a…

MALICIOUS

PDF

88.3 KB Created: 2021-03-04 07:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 53bf40b37797d7342f8b7b128be07e56 SHA-1: bbda0e08b134d3b246448774e66171a23692633e SHA-256: dcc951726b363d7a2b2a16898cb89d22a1a5d8c1f551f1931afa436a5c75aa4e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=fender+blues+deluxe+reissue+reverb+problems PDF link annotation
    • http://bestsaleshopin.xyz/jotopemakn6fea.pdfIn PDF document text
    • http://foxinawolukomat.iblogger.org/puzzle_page_crossword_answers_may_23.pdfIn PDF document text
    • http://moscowflowers.online/puwusadobimalapibugikifajasn4.pdfIn PDF document text
    • http://boomerangoo.site/79817164419vufc0.pdfIn PDF document text
    • http://flowerport.market/kawemidonc3055.pdfIn PDF document text
    • https://cdn.sqhk.co/vomofizog/vI9ghhb/personal_swot_analysis_examples_for_students.pdfIn PDF document text
    • http://vovality.club/60431806488qnsw0.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/hecjcge/22111412108.pdfIn PDF document text
    • http://basepati.22web.org/28077352169.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/ij8OjiS/mexovixuboruretigiduwu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxukulalodi/dAIvids/80021231860.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/star_trek_enterprise_season_3_episode_7_cast.pdfIn PDF document text
    • http://rollernefritmassage.xyz/befikre_full_movie_hd_1080p_filmyzillabiqkh.pdfIn PDF document text
    • http://devgame.design/which_zojirushi_rice_cooker_is_the_best7uzr5.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/periodontal_gum_surgery_recovery.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/FYZiigh/pisuvupuj.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/ggGjchi/light_meter_definition_biology.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/0gdWBRi/cod_cold_war_alpha_release_date_australia.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/ccna_study_guide_2017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://finesegugumemo.epizy.com/gibson_f_hole_template.pdfIn PDF document text
    • http://jupejorix.epizy.com/free_psd_calendar_template_2020.pdfIn PDF document text
    • http://rinexevijexaxi.epizy.com/12771248101.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_off00011ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA3 5116 bytes
SHA-256: ec95c2dfb964c46a35f9023c5f3e5a4dca91a24fed6e0d696d5aee2ac2de27e4
font_01_sfnt_off00012dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFB 10988 bytes
SHA-256: b32700f871a0d881ac5a872912badb0034a91c3264142eec8891a4ac06cc1130

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