Malicious PDF — malware analysis report

Static analysis result for SHA-256 038d2e52158e7a2f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-24 15:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 258a449577418c6b707bc23940d9714e SHA-1: 2bb47d9368fa3fc28b3cec5d36379de11eb71914 SHA-256: 038d2e52158e7a2fd88cbd8c199b1746f9e5501f9f8c9608e629b5764dadb4b3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://resalured.ru/award?keyword=flower+shop+business+plan+sample+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426279/normal_601709ac2d5fd.pdfIn PDF document text
    • http://prizinsta24.space/3827052146stwfg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_6045e46e3d95b.pdfIn PDF document text
    • http://cancandance.org/muzivejodijipuvuwpy461.pdfIn PDF document text
    • https://cdn.sqhk.co/livefodam/dhG7jeA/horse_mannequin_for_drawing.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/ihjbuGW/41324774839.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/l2hdhgN/17176541385.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/SeqEQoY/mekanexudumanagero.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/jRjfRhc/48358111138.pdfIn PDF document text
    • http://detonic-italia.website/subject_verb_agreement_exercises_with_answers_grade_3p531s.pdfIn PDF document text
    • http://olx-delivery.cc/troy_bilt_flex_mower_blade_replacement6xykn.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/7ibjfha/saw_classic_master_marble_cutter.pdfIn PDF document text
    • https://cdn.sqhk.co/bajafigotuvi/o0WPTjj/fosamugemuriveva.pdfIn PDF document text
    • http://cardioactiveitalia.site/fbi_most_wanted_word_template59e8g.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/35103990744.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/GVjiO6A/game_of_swords_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fe81315ae303.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/ad171b65-1055-4072-8ce2-b287c37ddb45/7149422317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84064cd8-075a-4ddd-835a-073d76914702/95815873820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ab850e-81a3-4e21-aab7-26f6daec78cb/they_say_i_say_4th_edition_readings.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/modified_kaban_s_protocol_for_tmj_ankylosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973f9e0d-95cb-4d9a-b26b-2ea57ed70016/honda_hrx217hya_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de07d1f-f8fc-42c7-baf7-4ed118f2004c/who_is_the_first_person_translated_quran_in_english.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_off0000fe04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 5468 bytes
SHA-256: 72e0ef2bb9ea03abd7b4462affc592e7b02d78e7699c0fa564f9ad4dbf66ff9e
font_01_sfnt_off00011081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11081 10540 bytes
SHA-256: fa2059340af0aa3ad14bbf0988e662754fd9dfaf82d912c99b7e1f2582b624fc