Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d0f8d49fa9b1d2…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 06:57:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1dc681f214697e4d4c05abdc84a817d7 SHA-1: d1f2750470ddabf2446a06c48ff691ecdfeb7d7d SHA-256: 22d0f8d49fa9b1d2de050dcd9af41b4791b83de9d98a147b1d831c1785fe07c6
162 Risk Score

Malware Insights

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

This PDF document employs a lure of game rewards and cheats to trick users into revealing sensitive information like private keys or recovery secrets. It contains numerous embedded URLs, many of which point to link farms designed to host similar lures, indicating a phishing or scam campaign. The ML classifier strongly flagged this PDF as malicious, supporting the observed malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/coin-master-daily-free-rewards-game-hack
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-no-human-verify_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-minecraft-account-list_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/robux-free-gift-card_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-aimbot_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-xbox-one-code-free_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/apps-to-get-free-robux_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-for-today_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-online-generator_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/game-hack-coin-master_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/hacks-code-to-run-in-roblox_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-115-2-hacks_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/master-coin-free-spin-daily_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052ed.bin
a844b9c0170d1f8379b27853df759414b56a786c987cc5d06888eb3d45367b3c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52ED 24100 bytes
font_01_sfnt_off000089ff.bin
d7aeb26289e2269d4bb478c8c95e02d02e09ec61abdc4523be76647d936bf4f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89FF 18468 bytes

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