Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb4254a4573d6ee…

MALICIOUS

PDF

44.4 KB Created: 2021-05-15 23:35:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 249d2c7f346bc1589e162ce17a084ac8 SHA-1: 228b806d142d45948642bbe275c8347a4356a8ee SHA-256: bdb4254a4573d6ee85fd4a0f74871c946fa94e0f6111bd31fda6f15a93dd9900
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-free-foxy-food-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/rbx-website_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004801.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4801 24804 bytes
SHA-256: 09e47fed7521661cc927cd554812d82ec0f85797328b67627281b79ba6aa95e6
font_01_sfnt_off00008120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD1 18272 bytes
SHA-256: 8ab577f7d11ec357d53ae04dd403853c84d9c5a16931abfa6eafc1dca89914d9

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