Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cef29ed596fff7a…

MALICIOUS

PDF

78.2 KB Created: 2021-03-08 15:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1c7ca0fdb52c19080a65ee2f956491f2 SHA-1: f5396eb8b1520102b68c74a13752356731bae52f SHA-256: 2cef29ed596fff7aec3f9f9adc758d617c00fc183e6e6a56409cc76f8f9b3867
126 Risk Score

Malware Insights

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

This PDF was flagged by ML and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it contains numerous links to external sites, likely to obscure the true malicious destination. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/wb?keyword=gangbusters%20rpg%20pdf PDF link annotation
    • https://cdn.sqhk.co/bazopaxepifu/LQiaHjb/coin_pusher_game_win_real_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_600f507a6ed20.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/xEhhgeL/67019305773.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/tarigasavel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fca49fe1951c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491175/normal_60237c709fd42.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/ovJElje/2107.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/planificacion_estrategica_ejemplo_practico.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/uZRhegi/leap_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/1oV3Vci/screen_recorder_mac_free_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/fjhE6gh/17374463212.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/gdDjhiX/ps4_controller_dtf_led_kit.pdfIn PDF document text
    • http://zexofezureza.iblogger.org/68675116376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5fe8ace512d5c.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/dzIjhCi/71973157040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_603174cba6872.pdfIn PDF document text
    • https://cdn.sqhk.co/bojodunaluko/jLelifW/jixamukolafebefu.pdfIn PDF document text
    • http://depalowivejal.iblogger.org/sight_words_activities_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudivakerimenog.epizy.com/joker_run_over_meme_template.pdfIn PDF document text
    • http://xefivaz.epizy.com/commonly_misused_words_worksheet.pdfIn PDF document text
    • http://zevusup.atwebpages.com/68925146229.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/77627803661.pdfIn PDF document text
    • http://kuxadob.rf.gd/kijunukaxulefuv.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_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 5348 bytes
SHA-256: 6ce19057c172ae1442959515173e71dcb2d86df76757e9b4e7fdd69912545540
font_01_sfnt_off000101ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EF 12756 bytes
SHA-256: 4c0e8c12abaf21a53b5e3f6c877a63a6d19139bb2453d1699ad1392b9ebb5944

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