Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb16965ec612cd1…

MALICIOUS

PDF

43.1 KB Created: 2021-05-16 15:32:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cc79b8b58acf7dcea84f70dcbc168596 SHA-1: 95b634e9382877d7d523526c9e46cb1b7b665c99 SHA-256: beb16965ec612cd17ab15f65d2b9e955683941d132c5b6528d0669b4de587072
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, which is a common lure for malicious sites. The embedded URL https://netcdn.xyz/app/479516143/toolbox-for-minecraft-game-hack is the primary indicator of this malicious redirection. The document body, though heavily obfuscated, contains references to game hacks and generators, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

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/479516143/toolbox-for-minecraft-game-hack PDF link annotation
    • http://cosver.eu/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/roblox-scam_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://youtuIn PDF document text
    • https://discord.ggIn 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_off00004b30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B30 26288 bytes
SHA-256: 35c9bbafd3a170c9c8461495d2af5622f76689841f7ae20f9a5c3fda888c48f0
font_01_sfnt_off00008681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8681 18152 bytes
SHA-256: becd460d7779cc5c3291c33eac3fb6dff78fe3ea9ee1e8d8b5f7e8ecc5cf93f5

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