Malicious PDF — malware analysis report

Static analysis result for SHA-256 92295c6302a6e14a…

MALICIOUS

PDF

75.8 KB Created: 2021-06-08 10:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3ddaf27505195f92fa75090596548590 SHA-1: 5bf57a9ff153d59a45c87eb9850fd26d05faec67 SHA-256: 92295c6302a6e14a9428c3762a49addb0059fb1895c5ad21ca8dbf62b97cc76f
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=cornbread+mafia+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450516/normal_6023fe723f6b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_60bd8cfa2bcb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gupiguna.pbworks.com/w/file/fetch/144551628/how_to_make_wood_texture_in_blender.pdfIn PDF document text
    • http://nafidob.pbworks.com/w/file/fetch/144602757/zabojunifesiduvox.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144569703/21775037814.pdfIn PDF document text
    • http://kimiwodevus.pbworks.com/w/file/fetch/144753780/face2face_pre-intermediate_workbook_answer_key.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144570234/gadaw.pdfIn PDF document text
    • http://busututesemo.pbworks.com/w/file/fetch/144828360/en_peu_in_french_means.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d08154-2551-4891-901d-b304d9855f03/what_will_the_future_be_like_in_2050.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/w/file/fetch/144500244/puximugibekugek.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144709773/sonig.pdfIn PDF document text
    • http://vevokofeju.pbworks.com/w/file/fetch/144656247/how_do_i_change_my_casio_calculator_to_radians.pdfIn PDF document text
    • http://zigunef.pbworks.com/f/tegufowisaxunafafu.pdfIn PDF document text
    • http://buwutel.pbworks.com/w/file/fetch/144796689/how_do_i_reset_my_kenmore_elite_he4t_washer.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/94876432449.pdfIn PDF document text
    • http://liguduper.pbworks.com/w/file/fetch/144576384/how_to_get_gems_in_pixel_petz.pdfIn PDF document text
    • http://xutosop.pbworks.com/f/77874720224.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/apres_un_reve_cello_sheet_music_imslp.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/3gp_mobile_movie_hindi_2018_download.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144762969/21888264762.pdfIn PDF document text
    • http://polubisoxuwo.pbworks.com/f/how_to_reset_a_roomba_980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3cc26f-6d98-45f4-b1a6-39ea4ed04840/schwinn_recumbent_230_exercise_bike.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_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 4952 bytes
SHA-256: eb4787172eb08c0fb7adb7773b07c2f914d67ef8e949f9b2b490113628bd83d4
font_01_sfnt_off0000fdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 10528 bytes
SHA-256: e170662f5ce2f390773c3cede85049c650d3dd438ef561291b9fa5ecf9ccb40b