Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cb6d4f9b4ee7df…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 05:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 488688b099ce563050b617083ca84fc6 SHA-1: 22f054b9ad6ee7d92c46ce11d1001e4d6c8b5d9a SHA-256: b7cb6d4f9b4ee7df80e6bf1afc0fe47878ff057d316e819b9fae8a75eba7259c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack generator, specifically for Coin Master. The embedded URL 'https://netcdn.xyz/app/406889139/coin-master-time-hack-2021-game-hack' is the primary lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a potentially malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-time-hack-2021-game-hack PDF link annotation
    • http://www.lacarla.dk/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/robux-hack_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/robux-get-com_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/haktuts-coin-master-free-spin-link_GM406889139.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
stream_003_off000047a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A3 25148 bytes
SHA-256: 3dd74b63740a055f3fd353794c60b582f97351895ff39969a6e7377480a36fba
font_01_sfnt_off00007fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC1 18380 bytes
SHA-256: d61a4547520ea8cafecc3ed258c73b3244e9bc9b68d98ecd8e3226df3b2774a6

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