Malicious PDF — malware analysis report

Static analysis result for SHA-256 13aeb7a98f376843…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 11:02:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a8033a3e0bd66a3f9c32399be5099e0d SHA-1: 10f443d7137befc48ef9636954ba830e492ef570 SHA-256: 13aeb7a98f376843e891a6b2f8e318a6b83bc624f9b67b94c74950a43e0169cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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.tw/app/431946152/free-robux-discord-servers-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hack-2p_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/omo-recuperar-una-uenga-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/https-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-earner_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-long-is-the-minecraft-free-trial_GM479516143.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_off0000307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307A 22776 bytes
SHA-256: aea3566d34ea42897ce905a3d657c6362ad2ee0bbe48b1547711c58a5ed4002d
font_01_sfnt_off000063bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BB 19292 bytes
SHA-256: b115a2c924602d7af6df8e60d1d5a0905588960aaa46bc3f51eeaab49e44319b

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