Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5ffb6bb5c36e6d…

MALICIOUS

PDF

43.1 KB Created: 2021-06-13 23:46:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a84f740db68eedbd190ea96849c00e2f SHA-1: ab2251c3422be2e4143eb273104f6e9eb29309b3 SHA-256: ab5ffb6bb5c36e6d3ac50ab78f906304edb878b0c7487e1a269ff6fcfd79e6ca
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for a 'free generator / game hack' and displays a fake CAPTCHA to trick the user into clicking a link. This link, http://netcdn.co/app/431946152/roblox-online-robux-hack-no-survey-game-hack, likely leads to a malicious website or a further download. The document's structure and content strongly suggest a phishing or social engineering attack aimed at users seeking game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.co/app/431946152/roblox-online-robux-hack-no-survey-game-hack PDF link annotation
    • https://i-tech.ac.id/perpus/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-free-admin-gear-codes_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-parkour-free-glowing-glove_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-2021-real_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/se-puede-hackear-roblox-con-la-nueva-actualizacion_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-fly-hack-we-are-devs_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-private-servers-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/rpxnow-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-account-v3rmillion_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/pastebin-robux-free-birthday-reward-7_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-in-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-plates-of-fate-hacks_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_off000048d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D6 26304 bytes
SHA-256: 96df5d35a2c5a6dd45dc0b2ee7653cb2c7c9a5c5d4707b433a0b176396841bc9
font_01_sfnt_off000084c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 18736 bytes
SHA-256: 8d78a91caf36ca62a36427da1537d3382fd968ac31feb5396b70d88e65e9c5a3

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