Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b57025eed36ca4b…

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 21:35:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6cab218c88688444f92748b1f1d59d5e SHA-1: a9f0513d5f5b4ddb64b1c3c4abbaa2973f67289b SHA-256: 4b57025eed36ca4b98f2de7d7e1bd5c1aedacb8842baf56f279196ce9c16900b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic indicating it links to a game hack lure. The embedded URL, https://netcdn.tw/app/431946152/cheat-code-roblox-vehicle-simulator-game-hack, likely leads to a malicious download or exploit. While no scripts were explicitly extracted, the PDF structure and URI findings strongly suggest a social engineering attack aimed at tricking users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/cheat-code-roblox-vehicle-simulator-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-redeem-code-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/create-minecraft-server-free_GM479516143.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_004_off00004f2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F2B 26768 bytes
SHA-256: e4e41f29cf6a7b06424c31c6db304da62f9c42c632cd5ac604780e95a5cb33bb
font_01_sfnt_off00008b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9D 19112 bytes
SHA-256: 8fedd73b71ba4acd7d53da6669c5168b5c0c6cb8fcc794aa96e143459b2075eb

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