Malicious PDF — malware analysis report

Static analysis result for SHA-256 b165ce7358700933…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 13:34:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bf6e91f11cf2ce6efe9362506edeed25 SHA-1: a9c7c8abc69cfc372d7705e10ce0e174b9ae77b3 SHA-256: b165ce7358700933abe735be820c8a70b097bf615afd6227ab3f058273c5f318
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a lure related to 'free Robux' and game hacks, directing users to the URL https://netcdn.online/app/431946152/game-give-free-robux-game-hack. This URL is flagged as a high-risk redirector, indicating it likely serves as a gateway to malicious content or further phishing attempts. The ML classifier also strongly flagged this PDF as malicious.

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/game-give-free-robux-game-hack PDF link annotation
    • https://library.stikesmi.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/pokemon-go-free-codes-2021_GM1094591345.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-followers-on-tiktok-no-verification_GM835599320.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_off00004ee6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE6 28436 bytes
SHA-256: c624589cbf30bc7b482615fdeaa6181299f1f766959ee3e85e6e6ad35d594940
font_01_sfnt_off00008f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0B 18736 bytes
SHA-256: 457049c0c0b067ea8a2ccaf5c24f39a354f8c872058b648fa686429afe9091ea

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