Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48b879bcdac930c…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 16:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: db01fefadb1feb09310df868ea062ff0 SHA-1: 1c99863b6a3f538d666381dac9715097dd89fd0e SHA-256: c48b879bcdac930c5914b0e211a90e4f8abcfb55056bcb12338f79c926cd1d4f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack lure. The embedded URL, https://netcdn.online/app/406889139/coin-master-free-coins-link-2021-game-hack, likely serves as a redirector to a malicious site or download. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to trick users into visiting 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.online/app/406889139/coin-master-free-coins-link-2021-game-hack PDF link annotation
    • https://www.jcn.co.uk/uploads/files/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-for-today_GM406889139.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_off00005241.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5241 25352 bytes
SHA-256: c425cfa50eb6523c93718c9c9a463f470356783f1de55242f706e35ea6292288
font_01_sfnt_off00008adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADC 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449