Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40c30e7ff5cc8db…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 12:56:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bc0a031c47df4afadd1887c040b7519d SHA-1: 3f7db25514a3967b6c56d0a89223b2737e33f140 SHA-256: b40c30e7ff5cc8db2d9b28df963d5b1ae335fb9ac4aac75525d6f9cd1fc99ddf
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 0.9864

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/431946152/robux-free-online-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/pokemon-go-free-event-box_GM1094591345.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-auto-miner-hack_GM479516143.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_off0000507f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507F 28780 bytes
SHA-256: 5544c632010b2715ca516e75680ce0a647bcb045af739f33e94b8da23c21bc2e
font_01_sfnt_off0000917b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 18208 bytes
SHA-256: 9c6e6aa5efa9903ee4d2fc70532f13b8880c04837d913a4df075592e4b137fb6

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