Malicious PDF — malware analysis report

Static analysis result for SHA-256 2134bbf3936642e8…

MALICIOUS

PDF

41.3 KB Created: 2021-05-15 03:39:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 179b6396398b66b072f8ad1f980b3316 SHA-1: a6f2f859cd1559d2d18b8f6c9339e3b67cd24944 SHA-256: 2134bbf3936642e8035d79f6c0754102a9d50339fa27fda3dda64d11562be7bc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The embedded URL and document body content further support this, pointing to a lure for game-related cheats. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-apk-mods-coin-master-game-hack PDF link annotation
    • http://no-no-gos.de/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://no-no-gos.de/images/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/roblox-premium-free_GM431946152.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_003_off000047fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FD 24416 bytes
SHA-256: ad3fc5948939e99a0c52f452d5e5bc9d0de967a5cc16f204a1f5ddd807336c58
font_01_sfnt_off00007f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 18228 bytes
SHA-256: a509887fe438e5ed86e88c18d1f8cef7695aab5f60dba5e7600e62c43e9fe0f1

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