Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56452efd4a7e920…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 01:36:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: de4cd9781f197a136005330cff74caac SHA-1: de1a9903c4e7553ae44cdf51d28d224260746c64 SHA-256: b56452efd4a7e920cac11d8948205695135b5b03498c19a20a80f8807f2e4fdc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to game hacks and free currency, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a likely attempt to redirect the user to malicious websites for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-on-phone-game-hack PDF link annotation
    • http://autoskola-scp.com/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-lua-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-royale-high-for-free-no-log-login_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hack-2021-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-use-free-gamepass-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-room-cheat-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-hack-2021-for-computer_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-do-speed-hack-on-roblox-mad-paintball_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-murder-15_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-free-no-login-or-password_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/hacks-to-get-money-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off000031ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EA 22056 bytes
SHA-256: ee4e82db09a6cdc61a4b2fb27d9c4a15c5a96376846a95a6245eee34a9973a4e
font_01_sfnt_off000062c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 19036 bytes
SHA-256: 3bc7039bf1a02ee44cf77d87306d68fb788e2fdb5082ebb4bdc7c743d7253944

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