Malicious PDF — malware analysis report

Static analysis result for SHA-256 821f9ad079449528…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 04:55:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 77e560d4c924bae8b8ac41b5e6834f32 SHA-1: 7d0665929ff48f0505ae990e8d991ba60c816027 SHA-256: 821f9ad079449528b25fc400f5188a07425a0082ab920b21a9d886bc73bf76a2
82 Risk Score

Malware Insights

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

The PDF contains embedded URLs and document body text that promote 'free spins' and 'hacks' for games, acting as a lure. The presence of a 'password-protected archive handoff' heuristic suggests the user is instructed to download an encrypted file, likely containing a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/free-coin-master-spins-2021-game-hack
    • http://library.yamasi.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/get-free-robux-no-verification_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/daily-coin-master_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/free-coin-master-spins_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/hacks-minecraft_GM479516143.pdf
    • http://library.yamasi.ac.id//repository/free-minecraft-skins-java_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/roblox-hack-codes_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/free-robux-app-2021_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/how-do-you-get-roebucks_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/free-spin-link-coin-master_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/minecraft-server-hacks_GM479516143.pdf
    • http://library.yamasi.ac.id//repository/roblox-com-games-referrer-roblox-player_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/free-robux-codes-not-used_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/are-minecraft-realms-free_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/minecraft-pe-mod-menu_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000502c.bin
6f065ce5b9f0f30e62d913e4be7bbac56044ece3ed65325b56b1b2c69352633b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x502C 25624 bytes
font_01_sfnt_off0000881e.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x881E 2840 bytes
font_02_sfnt_off000091d1.bin
cbf21fc5c11f74798808ab0cc71af5e4bf323ced5a050f8983f0748b8c809d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D1 18288 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.