Malicious PDF — malware analysis report

Static analysis result for SHA-256 54814065dc5f50aa…

MALICIOUS

PDF

33.3 KB Created: 2021-06-19 20:59:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5b5493914d28835d59796fdff4c0ea5f SHA-1: 637f3133cd6e4feb2ccce4a947fd1933f8787b25 SHA-256: 54814065dc5f50aa80329f4bf75bbaabc19f7654e6baf26b5aa46f73b2375af0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple embedded URLs, with the primary one being http://netcdn.co/app/431946152/free-earn-robux-game-hack, which likely leads to a malicious download or phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and URL patterns.

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-earn-robux-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-cbro-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/best-free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-cheat-codes-for-robux-and-tix-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-hack-top-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-verification-needed_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_off00002ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE9 22116 bytes
SHA-256: 691d5bbc647b22e95966c78f33dc6467ba056358736cf20a8ad16ce5ed6f3a80
font_01_sfnt_off00005def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 18716 bytes
SHA-256: 4499835773f4f22c2e584352416410afc93704e522f43def958767e915133bec

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