Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e766d7c9b721ee0…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 15:54:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e0622fbd6abd776352ecc994722c0915 SHA-1: 490bb06d200b79f616227da2e5df08ac54e1f775 SHA-256: 1e766d7c9b721ee0b0cf87d0caef284265fa46857421a27bddb1de93785236ad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/grabpoints-robux-game-hack. The document body and numerous extracted URLs reinforce this theme, suggesting a lure for users seeking in-game currency or cheats. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely to a site designed for credential harvesting or further malware delivery.

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/grabpoints-robux-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-lumber-tycoon-2-hack-glitch_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/get-free-robux-roblox-works_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-cheat-in-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-today_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-to-take-roblox-eye_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/jailbreak-download-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-ninja-legends-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-rebirths-roblox-uncopylocked_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-key-free-spin_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/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/exosite-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-for-ps3-free_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
font_00_sfnt_off00002f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3D 22728 bytes
SHA-256: 60efba016a68e599d9d4d2f6280632dd723ea6a390a7f67b23b11ca5c703874b
font_01_sfnt_off000061f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 18952 bytes
SHA-256: 3646c9e8f9274f81ffafdae012ef6d50837bbfb2ee4a4e5094e57fa7d940b82a

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