Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbb48d7d883eab4…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 10:43:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d75063556302664ffc9f89875a5d048b SHA-1: 70f1cddcb24ac057c9bce836846d694c2ec6164e SHA-256: 0dbb48d7d883eab4c56f50e6141b737a4818f0cce09076651d51b27e0dcdf61b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically mentioning Roblox and free usernames/passwords. It links to a URL that is likely a redirector for malicious content or phishing. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs supports a social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-roblox-usernames-and-passwords-game-hack PDF link annotation
    • https://www.gymun.cz/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/rbx-com_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-just-enter-username_GM431946152.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_off000047a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A2 24604 bytes
SHA-256: e4f78e6d5c696d277447f439dded455688c6f2931133826c3686407c1e1f9cb1
font_01_sfnt_off0000805c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805C 19112 bytes
SHA-256: 4ca79c3400c2e544e20f63a9868b58ba7722eecbf886e057a9204575cc512969

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