Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5730b2cd5f72b9…

MALICIOUS

PDF

85.0 KB Created: 2021-03-13 21:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 101cc6813e896533321842b7cd470c7f SHA-1: b086cffa0ed205f5eeaca07166aa1d986792cfb8 SHA-256: be5730b2cd5f72b9c28d51dfbb2bffac6e2ff2d53e65aa12b30cdbbf778d666d
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://gimoguvi.ru/award?keyword=common+adjectives+in+english+pdf PDF link annotation
    • http://kefets.xyz/lost_mine_of_phandelver_player_mapsbbi1x.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/yaesu_ft-450d_qst_review.pdfIn PDF document text
    • http://favanitum.iblogger.org/lexunazisukovetilevodokid.pdfIn PDF document text
    • http://circulshtangcalip.website/12728791252ti11n.pdfIn PDF document text
    • http://bulibujirifubof.scienceontheweb.net/cch_chuyn_t_sang_file_nh.pdfIn PDF document text
    • http://clebohets.xyz/48565982567dho4k.pdfIn PDF document text
    • http://netlysy.online/what_is_agile_kanban_methodologyejvdh.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/how_to_replace_belt_on_hoover_elite_rewind_vacuum.pdfIn PDF document text
    • http://govovimifakine.mywebcommunity.org/32657123244.pdfIn PDF document text
    • http://nakenanizugaxit.iblogger.org/mefiveja.pdfIn PDF document text
    • http://mamontov-net.cc/alto_shaam_smoker_manualnac8l.pdfIn PDF document text
    • http://zelimuletugebak.22web.org/the_monsters_and_the_critics_and_other_essays.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/pebepogogoranujor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajixubododafu.epizy.com/xamexuxirunubomawugejaru.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/39007439458.pdfIn PDF document text
    • http://sisufovofow.atwebpages.com/fallout_4_horror_mods_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/prince_of_persia_full_movie_download_in_hindi_300mb.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/the_collector_2012_full_movie.pdfIn PDF document text
    • http://nowaginog.epizy.com/which_catalyst_is_used_for_hydrogenation_of_vegetable_oil.pdfIn PDF document text
    • http://xuxixezatazifax.epizy.com/block_game_free_for_mobile.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/79732202573.pdfIn PDF document text
    • http://notijopozij.epizy.com/runigedavemu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/commitment_of_traders_report_graph.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/68210628076.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_off00010d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D63 5512 bytes
SHA-256: 69065b615d205aaac9536650432655f8d527c2f952f6966b1851118aae666099
font_01_sfnt_off0001200a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200A 11788 bytes
SHA-256: 356806df21f3b95e9e16f4692e088c1ec480c70aba021f9171ec8efa32a104a7

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