Malicious PDF — malware analysis report

Static analysis result for SHA-256 7205f5d2b860669e…

MALICIOUS

PDF

66.2 KB Created: 2021-02-21 00:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4ba856fef5b4f2730d1f292d542a7c07 SHA-1: 0e0d3ae8300cb0f023c338fad186a87b6887d8c2 SHA-256: 7205f5d2b860669eac9d1e061fcecab93e9305b7044af2cf83f948504668feea
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'https://jottigo.ru/wix?keyword=salon+1800+armitage'. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=salon+1800+armitage PDF link annotation
    • https://cdn.sqhk.co/rinugezig/hriaOhi/get_real_followers_and_likes_instant_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/hdjeElh/best_offline_slot_games_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/hgggPPL/29049436469.pdfIn PDF document text
    • http://fruit-citrus.space/yokogawa_digital_chart_recorder_manual3pdmv.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuworano/hdaW40g/4_pics_1_word_level_1882_answer.pdfIn PDF document text
    • http://vk-settings-change.online/colored_laminate_sheets_for_salendem8.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/fbibehc/general_knowledge_quiz_questions_and_answers_at_end.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bezopiwuzalobit.rf.gd/bts_highlight_reel_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/gastrointestinal_stromal_tumor_guidelines.pdfIn PDF document text
    • http://lulovijolezon.epizy.com/modern_world_history_california_edition_patterns_of_interaction_online_book.pdfIn PDF document text
    • http://nekipusixewid.epizy.com/pokibozek.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/ibps_application_form_for_clerk.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/faster_than_light_ships_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/practically_deformed_legally_blonde.pdfIn PDF document text
    • http://xifonefoje.epizy.com/sql_server_free_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/plafond_credit_impot_formation_chef_d_entreprise.pdfIn PDF document text
    • http://kujujonagojatu.epizy.com/6272157705.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_off0000c443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC443 5320 bytes
SHA-256: f1ce0bfdcb752301d7e02d90f2071a6ca4bf4bd803a10a71657027e6391208ee
font_01_sfnt_off0000d645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD645 10544 bytes
SHA-256: b96aaca258b740d01b86ceff3758352da779ab4894e6b0a7b6269167d53a5e24

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