Malicious PDF — malware analysis report

Static analysis result for SHA-256 924a508f3784b44c…

MALICIOUS

PDF

47.9 KB Created: 2021-06-02 11:10:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df85d18394550c114a1ab1601fa92420 SHA-1: 08eaaa4b3b4d7d7d97fd6a8d2a408a4771384fb7 SHA-256: 924a508f3784b44ceabe92e2590906e9f93d4057ff6c4819a65cb445b93d3240
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 0.9796

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/431946152/nuevo-hack-de-robux-game-hack PDF link annotation
    • http://www.marambio.com.ar/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://www.marambio.com.ar/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/http-blackgamesus-coinmasterhack_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_off00004fe4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE4 26396 bytes
SHA-256: eb87f32e3892eb157db9d40cfeb362dfedf134e3d81a80812e0e3dd7e0554f74
font_01_sfnt_off00008dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFB 2844 bytes
SHA-256: a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1
font_02_sfnt_off000097a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A2 18532 bytes
SHA-256: 886fe860b3a9148b1e46ae187cf72a75b38378ad5766657e5bf90efd3a252ece

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