Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b099f3d7e1f71ce…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 12:59:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7e35c843bd781d321ffdf4b21a549d06 SHA-1: 652bc8772bcb953cae21329d3a370d2afa2ba977 SHA-256: 5b099f3d7e1f71ce6f2f274d8be6926acd14f08c09889bf5e8a18f2b2108409d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to 'free admin in Roblox games' and a 'game hack', directing users to a suspicious URL. This pattern is commonly used to trick users into downloading malware or visiting phishing sites. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports a social engineering attack.

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/free-admin-in-roblox-games-game-hack PDF link annotation
    • https://pasca.unisba.ac.id/elibrary/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-adidas-pants_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/www-roblox-hack-top_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/adopt-me-roblox-building-hacks_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-item-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-draw-on-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hacker-vs-noob-vs-pro-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-skin-color_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/can-simeone-hack-your-roblox-account-theough-discord_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/secrect-free-rooms-in-roblox-high-school_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-a-roblox-account-no-bullshit_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-cheats-for-money-xbox-one_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robux-cheat-buncheats-club_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-phantom-forces-dll-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/como-hackear-counter-blox-roblox-offensive-en-espaol_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_off000031f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F2 23016 bytes
SHA-256: cd3df9595fc4ed62bc0f95675ee4d9d270327277fb0a27d0a23c1a998ab7bb7a
font_01_sfnt_off0000655d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655D 19204 bytes
SHA-256: f15fe11e0c29f3b1ee3fbcf72fe7aa7be1299e9ce4ff052851455fc6085a5b56

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