Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8b410748fdc2cd…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 14:45:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d769952177353314964212de17131604 SHA-1: 251cf394394b3368539e64be52bc290bd3490f7e SHA-256: bf8b410748fdc2cd43fbfee672f12e3f2d61701824a17e331c27bf77e10d3b9d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to 'free Robux' and 'game hacks', strongly suggesting a lure for users interested in such topics. The primary URL, http://netcdn.tw/app/431946152/free-robux-pastebin-game-hack, is flagged as a high-risk indicator for a redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or scam attempt, likely leading to a malicious download or website.

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.tw/app/431946152/free-robux-pastebin-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/instant-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-tool-download_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/does-roblox-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-speed-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-email-reset-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-i-get-free-spins-on-coin-master_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
font_00_sfnt_off00002ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA0 22680 bytes
SHA-256: cd9a32db38ad450438b8aad108e089bf350abd57e7b52f1f1c7a581a941ec60f
font_01_sfnt_off00005f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 19092 bytes
SHA-256: 5bfd890d84b0c14d72a786ae590b650f833002b15fe449ee91ced07c3ea68d33

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