Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f374f479c8aaaa9…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 08:02:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b51667a504ecdf779651d1854c4ca676 SHA-1: 712b3eb99097652614ded6bb61e54a8789abf421 SHA-256: 4f374f479c8aaaa97d77f0c54fc5dd5174ab542800eee4e1ce96b1904ee807b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous embedded URLs and a primary external URI pointing to sites that promise game-related cheats and freebies. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may also attempt to solicit sensitive information like private keys or passwords under the guise of account recovery. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.xyz/app/406889139/coin-master-heaven-free-spins-today-game-hack
    • http://www.art-concept.gr/images/free-coin-master-cards_GM406889139.pdf
    • http://www.art-concept.gr/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://www.art-concept.gr/images/www-rbxhut-com_GM431946152.pdf
    • http://www.art-concept.gr/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://www.art-concept.gr/images/coin-master-hack-without-verification_GM406889139.pdf
    • http://www.art-concept.gr/images/get-robux-now_GM431946152.pdf
    • http://www.art-concept.gr/images/games-that-give-free-robux_GM431946152.pdf
    • http://www.art-concept.gr/images/roblox-phantom-forces-hack_GM431946152.pdf
    • http://www.art-concept.gr/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://www.art-concept.gr/images/old-roblox-accounts-for-free_GM431946152.pdf
    • http://www.art-concept.gr/images/daily-coin-master-free-spin-apk_GM406889139.pdf
    • http://www.art-concept.gr/images/free-robux-safe_GM431946152.pdf
    • http://www.art-concept.gr/images/buy-robux-free_GM431946152.pdf
    • http://www.art-concept.gr/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdf
    • http://www.art-concept.gr/images/is-there-a-free-version-of-minecraft_GM479516143.pdf
    • http://www.art-concept.gr/images/coin-master-free-spins-11-01-2021_GM406889139.pdf
    • http://www.art-concept.gr/images/free-robux-glitch_GM431946152.pdf
    • http://www.art-concept.gr/images/minecraft-ore-finder-mod_GM479516143.pdf
    • http://www.art-concept.gr/images/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://www.art-concept.gr/images/coin-master-daily-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048bc.bin
d704def4cd86ac602f9c4918237b12bf67aaa85e1fd892d41bfa33148758abb4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BC 31344 bytes
font_01_sfnt_off00008880.bin
60a5a430713f1161b8494f77535ec8b7c572fc0a829325370a59d32a1885166f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8880 18356 bytes

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