Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe41364488e68661…

MALICIOUS

PDF

36.3 KB Created: 2021-07-08 00:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9741181bfb641142a8e4b69020157169 SHA-1: ab91f73c942e1de5a647b271b6701561f8270de0 SHA-256: fe41364488e6866175a3f577a986ba1bd4baf7e7eea28d420958c570daea2525
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 0.9980

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 http://netcdn.tw/app/431946152/withdraw-robux-game-hack PDF link annotation
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/114-hacks_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-exploit-mega-nz-free-emperor-roblox-hack-mega-nz_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/llogin-to-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-roblox-rescources-no-download-or-verification_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-admin-hack-script_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-hack-for-assassain-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/hacked-roblox-shirt-forums_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-roblox-golden-wings_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-spin-link-free_GM406889139.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
font_00_sfnt_off000034b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34B2 22816 bytes
SHA-256: 0838b8c8ae285ade63b2539dbd94f9e3ed29c25556d322a6cef16785b8e7f4ec
font_01_sfnt_off00006771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6771 19476 bytes
SHA-256: 88cb7ac3c962ee5f5b0cbbfc398b530c92eb9f3e646e2d9d69c1876f43b6d899

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