Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fbff3a4a34a50f…

MALICIOUS

PDF

54.1 KB Created: 2021-06-10 17:25:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ed7da5fff2895f713a1ec526eee3aee SHA-1: 668d97e482febd5cc096bab76c29368c0b8a85c7 SHA-256: 48fbff3a4a34a50f4c27c1a7aaeb38eeafa0c70327bc2e60df73a02ba7f39138
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains embedded URLs and a visual call-to-action, suggesting it is designed to trick users into downloading a malicious file, likely an archive requiring a password as indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9636

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/roblox-hack-ghots-simulator-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-2021-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-card-hack-apk_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-coins-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-if-you-join-my-group_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/dll-files-for-roblox-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-on-youtube-on-your-phone_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-admin-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/click-the-button-for-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-ram-in-vehicles-for-free-2021-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/pubg-uc-hilesi_GM1330123889.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-robux-generator_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacked-version_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/google-how-do-you-get-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/instagram-coin-master-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-app_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-links-for-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-send-a-trade-on-roblox-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-hack-no-survey-no-password-for-real_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000546a.bin
67fe8d0f5c2c6bbef038dd68ef40a6485e1500977dec75f8fcc8a1cca938e830		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x546A 36176 bytes
font_01_sfnt_off0000a561.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA561 2880 bytes
font_02_sfnt_off0000af4c.bin
4b9f7a74647edc7758643a6c28e6d65d38c3b83cce66342fb1f4c137b9985969		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4C 18972 bytes

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