Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f0d26af63729eb…

MALICIOUS

PDF

34.0 KB Created: 2021-06-25 23:55:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9cd81b60ecef1425fcf98883b7df56a6 SHA-1: 40d458737f0e30595a25ac8789653dcdd3419aad SHA-256: f8f0d26af63729eb4a9fc27da4e51825887e693f96604997982117ee094f8060
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains multiple embedded URLs that act as lures for game hacks and free currency, specifically targeting popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence, supporting the malicious verdict.

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/roblox-welcome-to-bloxburg-how-to-get-free-money-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-cute-outfits-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-new-free-hair_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/groups-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/super-super-happy-face-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-admin-gamepass-free_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_off00002de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE1 21600 bytes
SHA-256: d548faaf37483c6cc38aadef2e24fb5b2e61c091cb63bd25ae70751a6b407bf2
font_01_sfnt_off00005d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 19892 bytes
SHA-256: c68d5974d2fb63e05957a8fa0e36c9d5054369ca39a7a29a59e0ca77ec9b77a7

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