Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4708b11e54c83e9…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 08:47:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e94b5284fb29b04312cb0dba8d0abedf SHA-1: 4fd0e9a2c8a30e77c90b5b69457a09624487b0d1 SHA-256: f4708b11e54c83e969fefa73ef23fc650c778452c3bc0f81d4a374beeeb7ad78
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/free-military-costume-roblox-game-hack PDF link annotation
    • https://opac.heritagejkt.org//repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/downlaod-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/como-ser-hacker-en-roblox-en-grand-blox-auto_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-quiz-diva_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-items-that-are-now-expire-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/download-roblox-hack-pc_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-in-roblox-no-hacks-2021_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_off00003016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3016 22552 bytes
SHA-256: 8c0523073a5337f0cfc7a848b6acf7ee929a668e425e064ce581ab51a3c29bd2
font_01_sfnt_off00006266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 19652 bytes
SHA-256: 2c89b794e35fa9c26d3ec6b76147bc04706498843a7a0e447d4f08ead1ca0db2

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