Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecf28f2c0548421…

MALICIOUS

PDF

49.2 KB Created: 2021-06-11 06:12:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1edeba8a05961f2a6e2c5f1ef2e3984 SHA-1: acdd0e675ca24437e7176b5945be42b1c0d2cac7 SHA-256: 6ecf28f2c054842106ff97ab819c2ff044ea601e9ba14ed3f5cd5c842b75d882
82 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is malicious and embeds external URLs. The document body, though partially corrupted, suggests a lure related to hacking games, and the presence of a 'download button' heuristic combined with a 'password archive lure' points towards a social engineering tactic to trick users into downloading a payload. The primary malicious URL identified is https://netcdn.tw/app/431946152/can-roblox-games-be-hacked-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/can-roblox-games-be-hacked-game-hack
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/como-hackear-vehicle-simulator-roblox-para-tener-12000000_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/password-free-roblox-accounts_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
    • https://library.sttbandung.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdf
    • https://library.sttbandung.ac.id/repository/free-spins-for-coin-master_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/install-free-game-coin-master_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/coin-master-hack-mod-game-download_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/facebook-coin-master-hack_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/roblox-free-robux-codes_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/best-free-hair-roblox_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/coin-master-ios-hack_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/roblox-speed-change-cheat-engine_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/free-robux-no-verify-or-download_GM431946152.pdf
    • https://library.sttbandung.ac.id/repository/coin-master-hacks-that-work_GM406889139.pdf
    • https://library.sttbandung.ac.id/repository/minecraft-apk-114_GM479516143.pdf
    • https://library.sttbandung.ac.id/repository/roblox-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005379.bin
0307158ed55e1ab69db4ec096403b74221ca4a97271e79fb07ecf339603b404f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5379 27808 bytes
font_01_sfnt_off0000930b.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x930B 2824 bytes
font_02_sfnt_off00009cb9.bin
c9393bac47b87f8a1ede9119a310a987cf5946def84624d14b847b48e5042219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB9 18616 bytes

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