Malicious PDF — malware analysis report

Static analysis result for SHA-256 735568364212ede8…

MALICIOUS

PDF

50.5 KB Created: 2021-06-10 18:13:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1853b103b972adf9d2962ddf967b848f SHA-1: d53484e0713807f93ef918cb8b08bd90c238639a SHA-256: 735568364212ede82780458f7214372ff3548b44313986af03f58aaf3e80902a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that mimic game-related content to trick users into downloading files. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a download lure. The document body, though partially garbled, indicates a theme of "how to hack" for games like Roblox, aligning with common phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/how-to-hack-in-any-roblox-account-2021-game-hack
    • https://library.institutpendidikan.ac.id/repository/free-roblox-clothes_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/free-coins-coin-master-ios_GM406889139.pdf
    • https://library.institutpendidikan.ac.id/repository/minecraft-life-hacks_GM479516143.pdf
    • https://library.institutpendidikan.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdf
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-apk_GM406889139.pdf
    • https://library.institutpendidikan.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdf
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/earn-robux-today_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdf
    • https://library.institutpendidikan.ac.id/repository/new-roblox-hack-30-cmds-injection-jailbreakdll-2021_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-blogspot_GM406889139.pdf
    • https://library.institutpendidikan.ac.id/repository/free-money-and-spins-coin-master_GM406889139.pdf
    • https://library.institutpendidikan.ac.id/repository/free-robux-obby-2021_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/robux-offers_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/pokemon-go-free-license-key_GM1094591345.pdf
    • https://library.institutpendidikan.ac.id/repository/hack-roblox-game-ability_GM431946152.pdf
    • https://library.institutpendidikan.ac.id/repository/hack-coin-master-apk-33_GM406889139.pdf
    • https://library.institutpendidikan.ac.id/repository/coin-master-cheats-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000572d.bin
0c4a830f24c9763475ca4f29cdb0f537cf75eee97bd8d1b6da25d089918b3a2d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x572D 27808 bytes
font_01_sfnt_off0000943b.bin
e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943B 3500 bytes
font_02_sfnt_off00009fdc.bin
4b1fa1faf105b99fd2923f47d0688e1f5468398e24b7e936b3f5f66a590f08a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDC 19172 bytes

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