Malicious PDF — malware analysis report

Static analysis result for SHA-256 205d618c30cdfb4d…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 03:40:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f772725bbe54c894e6f9b5aa26b680d7 SHA-1: de955d0bb875f56986c5848ab7457aecb61b17ae SHA-256: 205d618c30cdfb4d47b559792cd3a635c1ec7a5c6b54d9f9f113c3660c1a7591
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free in-game currency, specifically referencing 'Robux' and 'game hack'. It includes multiple links to external websites, one of which is identified as a redirector for game hacks. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves social engineering to trick users into visiting potentially malicious sites.

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/how-to-get-free-robux-on-robloxxxx-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/tiktok-free-recharge-500_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/kachifpro_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-pe_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-limiteds-on-roblox_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
stream_004_off00005061.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5061 26688 bytes
SHA-256: 08809b32c4f2f198348d033c40d8fd433c521810bc6e8348c26e371d4f48b17b
font_01_sfnt_off00008cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBA 18356 bytes
SHA-256: 07f7f5fe088ebb6a81b9aca0d3b7acb37488304f642f9e675d153fcc87cea6c5

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