Malicious PDF — malware analysis report

Static analysis result for SHA-256 655b729ed8d299f5…

MALICIOUS

PDF

43.9 KB Created: 2021-05-18 04:08:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 19f9b2ee72e5ffc8145b73dbc41c0a29 SHA-1: 36bb2da949c53fbe0fb50ad31e71f390a6b08ecd SHA-256: 655b729ed8d299f5fbffa321ad19c578d8d1659c23e22c8f2f57d58f18eccbe2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering 'game hacks' and 'robux generators', a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of these deceptive links indicates an attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URIs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/easy-robux-hack-game-hack PDF link annotation
    • http://news123.it/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://news123.it/images/real-roblox_GM431946152.pdfIn PDF document text
    • http://news123.it/images/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://news123.it/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://news123.it/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://news123.it/images/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://news123.it/images/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://news123.it/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://news123.it/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://news123.it/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://news123.it/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://news123.it/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://news123.it/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://news123.it/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://news123.it/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://news123.it/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://news123.it/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://news123.it/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://news123.it/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://news123.it/images/free-spins-on-coin-master-cheat_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_003_off00004860.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4860 27988 bytes
SHA-256: 052fdaf208ba5e0a6d78692dd1f3aad624ade1d4cb9db25a408aab7a244f8668
font_01_sfnt_off000088df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DF 18428 bytes
SHA-256: 2bceebe5c1993dbcd4316f947943b347169ed843d74f7d3766fe916d90107923

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