Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8f4bd668f877a2…

MALICIOUS

PDF

78.1 KB Created: 2021-03-20 03:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8dbe319d47b7e3775f1a8ec86486155d SHA-1: 502afd149877acfbe85936f193efcb38dff5e37c SHA-256: bc8f4bd668f877a2c967e614cab1cf73aedcceae70e2b5731c4e2f8a9e0d15f6
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary lure pointing to a site offering 'N game 2 hacked'. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detection confirms it as a phishing/trojan. The presence of embedded URLs and the nature of the lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/wix?keyword=n+game+2+hacked PDF link annotation
    • https://cdn.sqhk.co/jifigetuxu/igjfjiW/6102068832.pdfIn PDF document text
    • http://muldwych.com/677482355229um1q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_600762397d40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_602934dbcc7cd.pdfIn PDF document text
    • http://merovew.xyz/online_html_js_formatterxvo31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5fd0785be2393.pdfIn PDF document text
    • http://whitetwo.space/jilupepol3foc.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/selezawefuwibejesijuves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_604b4dcf67cd5.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/dobanokonakesuwegoxilesu.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/gg1J4ib/club_america_dream_league_soccer_2020.pdfIn PDF document text
    • http://community-day.ru/patitodogimeb9y48l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_603e5b032d151.pdfIn PDF document text
    • http://ing-cliente.com/class_dojo_free_for_laptopx82ir.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/yuigK3O/73534096577.pdfIn PDF document text
    • http://raicen.com/how_can_uracil_replace_thyminefbqho.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/o3heOMv/mamubekolapov.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvojeve/hdugjun/video_editor_and_video_maker_viva_video_apk.pdfIn PDF document text
    • http://vehicleusains.com/819305683421xez0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/setigafat/91958404876.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/bemag_transformer_distributors.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/2115404510.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/parquet_file_format_advantages.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_off0000f456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 5212 bytes
SHA-256: 656817841f0a7777bc4d23ff2666d9ca72b2c080b7a405c3d52ae4b076278f95
font_01_sfnt_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 10812 bytes
SHA-256: 13b2d0c24f1b1800dfecd314ae9b6c7c469e99647c6f7652fd1f8f666186c1d0

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