Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ac022510b39b02…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 07:21:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ce00fa69acce2250e1dd79ab544a1f96 SHA-1: 1ae917fa5f0b9ab46a0c0e320f4357aebe0c4dec SHA-256: 90ac022510b39b02bfb140f4300886e16e0eddc018a99a7ae6ea9979f66fb9ec
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/admin-hack-roblox-dowload-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-roblox-mad-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-sword_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-anything-free-on-roblox-ios_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/howto-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-roblox-murder-mystery-2-youtube_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-on-ipad_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_off00002e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E28 22280 bytes
SHA-256: 291e25c9681e97ec179619dd9e92bf013f55565ed89a0ee18f23df4c216bef51
font_01_sfnt_off00005f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F79 19540 bytes
SHA-256: 09f6e5f30fa4227983512efa097ccc4eee2855f3be6c0e1b673ec68bb3f385e6

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