Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcff7ffeaac7f57…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 23:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4d5cbf228564c74b8ea7d6ecd53c900b SHA-1: 73b00f860a23ee5e46ac089b4324c7384eb77966 SHA-256: 8fcff7ffeaac7f57cdae9da14985bc756b5702bfa50106243b7cd9c2a3e03d0d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a lure related to game hacks and free spins, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the PDF's structure includes external URI links designed to redirect users. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used for malicious redirection or exploitation.

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/easy-free-spins-coin-master-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-roblox-with-cheat-engine-65_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-bonus_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_off00004fbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBB 25628 bytes
SHA-256: 88401d39478f3cb269e12d49d9f1ce6b441f363310fec1e37e9fc22ccafedbc3
font_01_sfnt_off00008a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A98 18068 bytes
SHA-256: 2b5bcb60036e8604cee537a76a0c1d845177aa2c28f1eb7ce8b27015c89bb61f

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