Malicious PDF — malware analysis report

Static analysis result for SHA-256 3929de5b2db1b0c2…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 07:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b35ae9ab5e9fce8f0d2e167b95e3010e SHA-1: 480bc78e58b8053782b0f220d130b11f643caae6 SHA-256: 3929de5b2db1b0c2a7336cc7fc8ff7d335cf25308eb616161cd061bf27acb98e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise game hacks and free generators, such as 'moon-static-coin-master-generator-hacks-free-game-hack'. These links are highly suspicious and likely serve as a lure to download malicious payloads or redirect users to phishing pages. The ML classifier also flagged this PDF as malicious with a high probability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/moon-static-coin-master-generator-hacks-free-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-much-is-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-auto-miner-hack_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_off000050d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D8 24904 bytes
SHA-256: bc214e538e324738347c199e63fc94c045cd54660ff6dee467d8f8e89f81aad5
font_01_sfnt_off00008a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3B 17880 bytes
SHA-256: 12faecc5962592d277de3e4fe4bc4692cb4c94937b2745323735b12f582b8c4f

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