Malicious PDF — malware analysis report

Static analysis result for SHA-256 4852f089b36c0fa9…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 09:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8675c5cb1eafdcce4baf6431be01bd07 SHA-1: be2ccf620d0d99ad318e30b1541146e34bd16578 SHA-256: 4852f089b36c0fa9cd20453be0416c64eabf62ad2b042a4f396def04502f3aed
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.tw/app/431946152/how-to-get-free-robux-on-roblox-game-hack PDF link annotation
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/more-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/como-tener-wall-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-grnrator-online-no-suveyes_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/best-roblox-games-free_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-on-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/twisted-murderer-roblox-level-hack-with-nopde-engine_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coins-and-spins-link_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_off000031b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B1 22324 bytes
SHA-256: a48a3779f17d0ecdad319065d9225942f26a0e823814521602c8b1d178459cd6
font_01_sfnt_off00006363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 19056 bytes
SHA-256: 22e79bf31db193f266ad8ef0f47d1a9e736b831aec58415b80c9b2f57893c59e

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