Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31ef84334e53ae8…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 15:43:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b575ad20d337e1281a746e7c5c3cd005 SHA-1: 758582eacd76ad42a5cbac37614d13b49ddcfb3e SHA-256: f31ef84334e53ae8a72698eb61fc29409c919a901c2d55fc298c45d875d12927
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and text that lure the user into downloading a file, likely a game hack or cheat. The ML classifier strongly flagged this PDF as malicious, and the presence of a password archive lure heuristic suggests the downloaded content may be encrypted to evade initial security checks. The primary IOC is the malicious URL used for the download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/games-like-minecraft-but-free-game-hack
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/flame-gg-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/earn-free-spins-for-coin-master_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roebucks_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/free-minecraft-skin-creator_GM479516143.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-without-root_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/password-free-roblox-accounts_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-codes-2021_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/legit-coin-master-hack-without-verification_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/get-free-spins-on-coin-master_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-free-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003146.bin
b90133e24f52c9236e5754682c53dece6d9ddb110daddad31458b92de63f2fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3146 22120 bytes
font_01_sfnt_off0000624d.bin
45333c73372c7943a74bef752753338b098f9514411db91a74ac505656791b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 18644 bytes

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