Malicious PDF — malware analysis report

Static analysis result for SHA-256 11df41d79ce67b37…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 20:04:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6ffe4fa8c2b9f53c55836b141668f1e3 SHA-1: 4416862c2c501cea80244bf6b271ef18711919a2 SHA-256: 11df41d79ce67b37c48f3c6decb1ff5dd5ec4f1849bf99407c20b54b2757167a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a high-risk heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.co/app/431946152/free-roblox-toy-codes-free-game-hack. The document body also contains this URL and other similar lures for game cheats and items, suggesting a social engineering tactic to drive users to potentially malicious content. No scripts were extracted, but the PDF's structure and embedded URLs point towards a phishing or malware distribution attempt.

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-roblox-toy-codes-free-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-obc-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-unblocked-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-superhero-package-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-promo-codes-2021-works_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/win-free-robux-robux-robux-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-murderer-mystery-2-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-no-human-verification-2021-or-survey-generator_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/javascript-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-tix-dominus-roblox_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_off000030b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B6 22300 bytes
SHA-256: 38feb0c349311fb67b805f81e773bfecc088ad49b4e65f639417337dd7c1f8a5
font_01_sfnt_off0000625a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 19004 bytes
SHA-256: 1ff580798b8255c0963ae009c059e6c806a9acd131ddedca225016f2881ecfe0

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