Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e25b41f45f9cef…

MALICIOUS

PDF

80.3 KB Created: 2021-03-13 13:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78bc6b42d76735b563c9a093a3f1c719 SHA-1: 5f07c5cc08b16877568960078475cdcea3ec9370 SHA-256: 93e25b41f45f9cef72413a6061199dd0a1fb32379dc26e9ef123e89095f66ee8
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 0.9991

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://bologen.ru/aws?utm_term=how+bad+could+i+possibly+be+lyrics PDF link annotation
    • http://pet-guru.shop/will_grayson_will_grayson_book_downloadn7wt7.pdfIn PDF document text
    • http://rawenspant.online/advanced_grammar_in_use_apk_obbm1vt1.pdfIn PDF document text
    • http://natlab.ru/lease_agreement_without_rent_format628jv.pdfIn PDF document text
    • http://netopodimamo.mywebcommunity.org/57826202956.pdfIn PDF document text
    • http://spencermcman.us/eventide_space_reverb_and_beyond4k2r9.pdfIn PDF document text
    • http://citrus-fruit.space/435555049215a5kj.pdfIn PDF document text
    • http://buloshnaya.site/corporate_a4_brochure_templates_freeso9qz.pdfIn PDF document text
    • http://1ux.site/gegiwutidaravakepuror24kf.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/assets_and_liabilities_management_by_commercial_bankscxek6.pdfIn PDF document text
    • https://baziwiruxufuwav.weebly.com/uploads/1/3/1/4/131482892/2719.pdfIn PDF document text
    • http://zelopaqq.xyz/romeo_y_julieta_resumen_del_libro1g3ie.pdfIn PDF document text
    • https://weligolujevis.weebly.com/uploads/1/3/4/7/134748453/vosog_xizuli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zejibanunepi.myartsonline.com/present_tense_word_for_listen.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/what_is_social_constructionism_in_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/42609652024.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/simile_worksheets_2nd_grade.pdfIn PDF document text
    • http://bulujulu.rf.gd/xixuberafabovasale.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/71076110983.pdfIn PDF document text
    • http://rirusivinudi.rf.gd/hollywood_action_movie_tamil_dubbed_free.pdfIn PDF document text
    • http://melaworogafema.epizy.com/borbaad_songs_webmusic.pdfIn PDF document text
    • http://tikimolanevi.rf.gd/john_grisham_a_time_for_mercy_target.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/casanova_hotel_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/choices_apk_ios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 5056 bytes
SHA-256: 678cddd14864e7ce6c3d6c773fbdc952dd1a633a1fb9d86af5a0ffd9dca4e599
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 11248 bytes
SHA-256: 90488492982e9780036f334f7ef423f5142f63cd86aae119deeb093d872e6483
font_02_sfnt_off000124e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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