Malicious PDF — malware analysis report

Static analysis result for SHA-256 1081ec3759c809be…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 08:10:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 37e32c84b1da3fa172902b06216e42c9 SHA-1: 4ac5be2a4aa7102e16ce8dc975bf2918573a99e4 SHA-256: 1081ec3759c809be9fbad9d18bab8c39c1bcece59684c2387b66fe0353d9b45d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL related to Roblox game hacks. The document body also contains similar lure text and URLs. While no scripts were extracted, the primary attack vector appears to be social engineering via a malicious link embedded within the PDF, aiming to trick users into visiting a potentially harmful site.

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.co/app/431946152/floating-hack-roblox-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/coun-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/dragon-ball-final-stand-hack-stat-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-look-awesome-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-items_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/music-hacker-roblox_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_off0000302a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302A 22480 bytes
SHA-256: f421088a636d6a0e0efef5bbd2e3aae3d59ceaa1b4307ad73b1fc50b53168496
font_01_sfnt_off0000624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 19044 bytes
SHA-256: 4f2451b6d8089f4eb2822ff6cdf47068ba1efc7d8e2ae90e9db22d82ec39b6fd

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