Malicious PDF — malware analysis report

Static analysis result for SHA-256 551712725d911c8d…

MALICIOUS

PDF

47.2 KB Created: 2021-05-14 17:14:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1302fc9f32af36c8af1e0ce69bc085e1 SHA-1: f1daf1dc6eaca4cb1d57ebeb699de1215cc87097 SHA-256: 551712725d911c8df9f9e381b8dee6868ed046eafe2105dad0915749d7958d6d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs pointing to sites offering game hacks and cheats, suggesting a lure for users seeking unauthorized game modifications. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may also instruct users to provide a password for an archive, a common tactic to bypass security filters. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/406889139/coin-master-apk-hack-3.5.27-game-hack
    • http://arch-centr.ru/images/free-roblox-script-executor_GM431946152.pdf
    • http://arch-centr.ru/images/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://arch-centr.ru/images/free-promo-codes-for-coin-master_GM406889139.pdf
    • http://arch-centr.ru/images/roblox-booga-booga-hack_GM431946152.pdf
    • http://arch-centr.ru/images/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://arch-centr.ru/images/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://arch-centr.ru/images/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • http://arch-centr.ru/images/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • http://arch-centr.ru/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://arch-centr.ru/images/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://arch-centr.ru/images/coin-master-hack-2021_GM406889139.pdf
    • http://arch-centr.ru/images/coin-master-official-website_GM406889139.pdf
    • http://arch-centr.ru/images/free-robux-mod_GM431946152.pdf
    • http://arch-centr.ru/images/robux-free-2021_GM431946152.pdf
    • http://arch-centr.ru/images/minecraft-redeem-code-free_GM479516143.pdf
    • http://arch-centr.ru/images/earn-robux-sites_GM431946152.pdf
    • http://arch-centr.ru/images/coin-master-time-hack_GM406889139.pdf
    • http://arch-centr.ru/images/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://arch-centr.ru/images/robux-hack-2021_GM431946152.pdf
    • http://arch-centr.ru/images/coin-master-hack-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba0.bin
34894a5b628f41a55ebab1e685bffcf98786342fcc9c5c8d8fb6ea4032b6b5bf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA0 27464 bytes
font_01_sfnt_off00008b8e.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8E 2840 bytes
font_02_sfnt_off00009540.bin
d7b411bc329c7870ca7e99b8bc052e1a3384b1dfbd17097feb878e8a7e113822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9540 18448 bytes

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