Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0739a0dcc2070f…

MALICIOUS

PDF

61.4 KB Created: 2021-02-17 16:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1e9f9c70a73d899743587eaecc8d9fc3 SHA-1: 81a801ec04a7bc67cf08a90fc12a7bf26fcd2d6b SHA-256: ac0739a0dcc2070f0819a6c3a96281d3d4f676d018472859862dee3ad353d8c6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=how%20do%20i%20reset%20my%20lowrance%20elite%207 In PDF document text
    • http://apparentlyopt.com/audio_booster_android_root68mqy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_601158828ac80.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/iil54ri/the_seven_deadly_sins_grand_cross_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471512/normal_601d6ad448fc9.pdfIn PDF document text
    • http://helpcenter.business/brahmachari_mogudu_telugu_movie_songs_freet82j5.pdfIn PDF document text
    • http://pejofewetoz.22web.org/94932780824.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zomusuxine.rf.gd/gerund_or_infinitive_worksheet.pdfIn PDF document text
    • http://mejitakofiragi.epizy.com/tusijajubuwuvulap.pdfIn PDF document text
    • http://zefuziboveteg.epizy.com/doddinghurst_primary_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/matal_dance_song_2017.pdfIn PDF document text
    • http://tujijekaxevon.rf.gd/question_answers_of_chapter_7_packing.pdfIn PDF document text
    • http://lumaradidufil.epizy.com/electro_house_music_2018.pdfIn PDF document text
    • http://desiwafinu.epizy.com/water_bottle_labels_template_size.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/72804849430.pdfIn PDF document text
    • http://posugez.epizy.com/75385169713.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_off0000b73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73E 5320 bytes
SHA-256: 18d3868e8cd7b0eb6656296c1e059e6f8559b4ec06e775f0004a7b8872ea7966
font_01_sfnt_off0000c958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC958 9184 bytes
SHA-256: 84947e68d4ad65fc6d5b8b7ec1230c1a0566bae6d4fdbe124b13e568bb4d8039