Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3afc827cdfb2e74…

MALICIOUS

PDF

34.4 KB Created: 2021-06-23 16:11:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2142434dc38fd39e14377d54cbce130c SHA-1: 3453c7dba0e5ee7a17d2f487893c0c7cb5351142 SHA-256: c3afc827cdfb2e746314aaaedcdb4f0ec426da24907a671d030b587de5d2937d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and promo codes, specifically mentioning Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. While no scripts were extracted, the embedded URLs suggest 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/roblox-promo-codes-2021-free-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-accounts-2021-december_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/easy-roblox-hacks-not-malware_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-free-kein-online-konto_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cool-free-items_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-without-installing-apps_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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22072 bytes
SHA-256: e87d13c0efa9126129d1aa7e5ff03e0dbfcb15d5aae0552c65b651cd2523b4ed
font_01_sfnt_off00005fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCA 19640 bytes
SHA-256: 97a5fc7c369cc633e016cc1c2bf40e8d13f6506e45b71d87799e0ee20b496127

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