Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1502282dfdf39c3…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 22:13:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 90309e785131290810f2c25a615a807b SHA-1: 3afeebedf48a7a249be944bac40966fa24097725 SHA-256: a1502282dfdf39c3ade91dcdaa54e4d85d08beba58d95323cfa7b6b0e508a068
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux generator' and links to a suspicious URL. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates the document is designed to redirect users to a malicious site. The presence of embedded URLs and the overall structure suggest an attempt to trick users into visiting a potentially harmful resource, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/free-robux-app-real-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-generator_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-games-that-give-you-free-robux_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
font_00_sfnt_off000051f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51F2 27100 bytes
SHA-256: 86898223009983a2830d91544907e6f5f2dff3b69bbd39f1f1fbac413e298912
font_01_sfnt_off00008ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 18492 bytes
SHA-256: 9e447b6d8b47d61e54db9515b6598511f2c2f765926adb3e35dae1cd8ee44e1f

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