Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a328dca66a9bb44…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 13:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bff5c8b0fda6461c1482590a6de967e0 SHA-1: 30f21b71fc6697a2a8fee91dbd9ed643c209e70d SHA-256: 5a328dca66a9bb447d1012ec5bac045f58aa139dee6c55b65b1b76de3fc8c410
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one that directly links to a 'free Robux game hack' lure. The ML classifier strongly flagged this PDF as malicious. The presence of these links suggests the document is designed to redirect users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/431946152/you-promised-my-son-free-robux-game-hack PDF link annotation
    • http://pustaka.faterna.unand.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-emperor-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-2021-no-hack-or-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/earn-free-robux-roblox-win_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-have-a-cool-roblox-avatar-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-hacks-ru_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-robux-dylan_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-hack-into-robloxs-top-model_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-patch-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/is-nexusus-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-roblox-accounts-2021-december_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-robux-on-roblox-for-free-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-hack-money-tycoons-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/money-hack-ultimate-driving-roblox-2021-april_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/meepcity-roblox-hack-menu_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hacks-for-roblox-no-human-vertifcation_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/5-roblox-games-that-give-free-robux-working-youtubeyoutube_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CF 22180 bytes
SHA-256: 00d3182d5095da4f598a62b1e79f6e5dbb444c7efbea6164c06280dfb2e2aac5
font_01_sfnt_off00006183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 19960 bytes
SHA-256: f29a7a7b71d38b505cc7d4cb2f72b745270787244330deb29ff722716c8b7989

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