Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57a8fb7eb738fb0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 05:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4c177ef5a30b6d38052f4c5c80cf72dd SHA-1: d65295a03fbc86a71c36ba057b313f6677502f4f SHA-256: a57a8fb7eb738fb0bb0cfa615a37355b3ef52e0e28f7f16ede26176106104080
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically for Coin Master and Roblox, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a site that likely hosts malware or phishing content.

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/406889139/cheat-codes-for-coin-master-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-hack-client-for-roblox-pc_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-into-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/best-roblox-hack-scripts-paste-bin_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-pet-simulator-dominus-huge-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-bc-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/snowed-out-v2-roblox-hack-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-pastebin-fast_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-cheat-engine-scripts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-redwood-prison-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-generator-com_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_off000031f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F1 22680 bytes
SHA-256: 530fb3726915a3e6cfeb7a8912da56773e1eb9f050c3353c28bfbfe049619c6e
font_01_sfnt_off000064a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 18336 bytes
SHA-256: 46a5dce1bcd15fef46771321b75302700fdbe642ab852c79c7094750b70fcfec

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