Malicious PDF — malware analysis report

Static analysis result for SHA-256 2146a50837a6b60c…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 21:29:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8fdee4b17139f725bcc1e70bba591a4b SHA-1: a0b2e6c2eeca3fa8220929071ba3b4052b1dbdb0 SHA-256: 2146a50837a6b60c1e21f4b88ece1aa00ccc6f07f22422ebbc15e1ca38dc0e3b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free Minecraft Gift Card" and "game hack", directing users to a suspicious URL. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/free-minecraft-gift-card-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/pubg-uc-zarah_GM1330123889.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FB 26112 bytes
SHA-256: a85edec441928912ee83e02fb10ae661c4446fe07b80f47bb5429e923bc9a82b
font_01_sfnt_off00008d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D84 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off0000976d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976D 17744 bytes
SHA-256: 412a36652a267303b09d9e36b031a0404a0bdd6a44abe5b102e4b1338e0002a7

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