Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c04eca80f370878…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 07:59:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9e406443474ed7ad31220cf63cffcaed SHA-1: 0193906ac2e7509f3983d0fdb3bdfe58110ecba0 SHA-256: 5c04eca80f3708785d15163ac9f4eca9f5af73d69155ddf685f73c51fc9e35b1
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 0.9864

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/431946152/roblox-hack-apk-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokeballs-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-font-free-download_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-add-robux-to-your-account-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pubg-uc-quiz_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-get-minecraft-for-free_GM479516143.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_004_off00004ff6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF6 28192 bytes
SHA-256: 3a2e62486479de85bfc052d4665839a60cee450c2b498affb3a16305d0a0814f
font_01_sfnt_off00008f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F79 18356 bytes
SHA-256: 7cdc4109e76722f5b523df4cd1b295e2212ddbe91aca110ba626f8c95e058f26

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