Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4210f68212dc8a…

MALICIOUS

PDF

72.9 KB Created: 2021-03-25 16:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f35bba833d4190e9461f5691b09e222 SHA-1: 242fb82aa9f1ebedd88aeb44e72dbe181fcde7e4 SHA-256: ff4210f68212dc8ac7d3059b99094ca7815a39a29da9835cb43d375a79be64a9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'dafemum.ru' was extracted, suggesting a redirection to a malicious site. No scripts were extracted, but the PDF structure and embedded URI are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=ancient+egypt+study+guide+3rd+grade
    • http://tolebexeju.22web.org/biologics_in_dermatology.pdf
    • https://cdn.sqhk.co/muvasesuru/GhixHhg/webupigaluzikegogisobel.pdf
    • https://cdn-cms.f-static.net/uploads/4465537/normal_5fd9716baa8d4.pdf
    • https://cdn-cms.f-static.net/uploads/4374953/normal_6032559e0e091.pdf
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5fd21f99d60d4.pdf
    • http://butinejijobu.iblogger.org/33480439861.pdf
    • https://cdn.sqhk.co/posukomokufi/Sdjgpjj/mini_arcade_two_player_games_android.pdf
    • https://cdn-cms.f-static.net/uploads/4497395/normal_604db628c1196.pdf
    • https://cdn-cms.f-static.net/uploads/4471481/normal_60509135edf65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ratobewiwigu.atwebpages.com/fixapuzawirizuzujuvaga.pdf
    • https://uploads.strikinglycdn.com/files/c0973c55-0741-4183-92bf-3a7190b2dcc4/89688131814.pdf
    • http://timodetunidup.epizy.com/jojonudafo.pdf
    • https://uploads.strikinglycdn.com/files/f2acc7bc-b10d-470a-8555-b2708326569d/xivoresesavuwuwula.pdf
    • http://pebomotixot.myartsonline.com/miss_peregrine_home_for_peculiar_movie_stream_online.pdf
    • http://waxedejav.epizy.com/baldurs_gate_2_switch_coop.pdf
    • http://laxuraxosolun.epizy.com/lorevimuketoneboputinal.pdf
    • http://wefexafunedex.epizy.com/vertebrate_and_invertebrate_animals_worksheets.pdf
    • http://wefitoxoke.epizy.com/xolaretivutiwik.pdf
    • http://sudebitije.rf.gd/39487987757.pdf
    • http://rukaxeretipaj.epizy.com/98215214094.pdf
    • http://rewuwuja.onlinewebshop.net/problem_solving_101_free_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dedd.bin
a05ada0e55817d7b5c14959b32d51ec0d26a7d032632b926ade8e26c7faae1c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 5464 bytes
font_01_sfnt_off0000f18d.bin
aa92259b5be04ddcb84fc2cb016e7374ef3182ce0ab2dcd9ce3e59ec81290b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 10776 bytes