Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d0d02b651d70bc…

MALICIOUS

PDF

69.7 KB Created: 2021-02-14 06:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 86cd270b1d9878d1ba0a084c688213cd SHA-1: 5bd25d9f123b7283dd96007383f489da90e89aca SHA-256: d5d0d02b651d70bc603831a5ba2fd4786bbb77c4eee545286357384f19b60963
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The document body, though heavily obfuscated, contains keywords related to 'coin master cheats', suggesting a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=coin+master+cheats+ios+2020 PDF link annotation
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/c5f7167e.pdfIn PDF document text
    • https://dujapiloxi.weebly.com/uploads/1/3/1/8/131857305/05a195b7af.pdfIn PDF document text
    • http://tulalenabeparuk.iblogger.org/satejetebapovuzevezedep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492875/normal_601f37647a690.pdfIn PDF document text
    • http://vifijes.22web.org/fantasy_football_statistics_spreadsheet.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/5481832.pdfIn PDF document text
    • http://vijasoga.22web.org/screen_share_apps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gasigigi.rf.gd/fexikoliziserimetilo.pdfIn PDF document text
    • http://zozezad.epizy.com/waterfall_model.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/94529705906.pdfIn PDF document text
    • http://fizufanotujo.epizy.com/59623228808.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/bururawe.pdfIn PDF document text
    • http://nivajunupoz.epizy.com/nunanagojipekuduvidef.pdfIn PDF document text
    • http://novoboninixeme.epizy.com/expenses_spreadsheet_excel_free.pdfIn PDF document text
    • http://wotadow.rf.gd/bakavixawifix.pdfIn PDF document text
    • http://rafesule.rf.gd/dolefa.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/excel_2010_cheat_sheet_quick_reference_charts.pdfIn PDF document text
    • http://wafuzujutine.rf.gd/princess_coloring_sheet_printables.pdfIn PDF document text
    • http://darozux.epizy.com/konjac_shirataki_noodles_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/91288738123.pdfIn PDF document text
    • http://zajegugolex.epizy.com/bunker_hill_wireless_security_camera_manual.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_off0000d504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD504 5184 bytes
SHA-256: 476c0e80f8ba2a028dfd749f5ca63139e9130fd1b5f78cdc5e9f9f9b401fac2e
font_01_sfnt_off0000e66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 10224 bytes
SHA-256: 99f151b06472463ed4257d4e0873e96ccc922b4dea2f9a246a0b2a7b91743e00

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