Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59231f81a85b36f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 22:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b0d5ff0ad1cf131ec8e55438a0911bfd SHA-1: c013ec2184343966a10b4e62596f0f4c8109f48d SHA-256: d59231f81a85b36fb601dfa12e7c04b8957c03748e9f4c3fadce7e5440b906fb
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/406889139/coin-master-free-spins-link-2021-twitter-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-accounts-roblox-script_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/grab-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-wings-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-moon-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-apk-link_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_off00003082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3082 22660 bytes
SHA-256: 4aab0c85dabca3c0fa2ef6f0b5ab2a1dd8a4cfcee6804399df2c33b2e808113e
font_01_sfnt_off00006315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6315 18908 bytes
SHA-256: b043e4a019f31cebff09b938e1120b84c3066f7adfb90df1330482920140b640

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