Malicious PDF — malware analysis report

Static analysis result for SHA-256 571cf1fabe41a0b5…

MALICIOUS

PDF

45.4 KB Created: 2021-06-02 20:33:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2a7cd6920d276790ec442e266ea85151 SHA-1: c7cc0afc60d24f941812479673fda0bd4d115217 SHA-256: 571cf1fabe41a0b5eda4dc31a440556faee7ed1bb2740f6330eaf9751d3ca88e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of offering free in-game currency or hacks for popular games, directing users to external URLs. The presence of multiple game-related lures and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful websites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/431946152/how-to-get-free-vip-server-in-roblox-game-hack PDF link annotation
    • http://solidkom.ch/images/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://solidkom.ch/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/pastabin-free-robux_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B0 25388 bytes
SHA-256: 1e68c0373c2f65eb8f80fd2dd9487db1e91c62f51c58ddfa3bd8402c5cb31032
font_01_sfnt_off00008d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D83 18760 bytes
SHA-256: 573f29a1450a007e9a470c2306c6192632a33ce1215ee2f436297ff873b241b5

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