Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ed1e59b54959d2…

MALICIOUS

PDF

44.5 KB Created: 2021-05-19 11:23:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2261bf425b311a12c2d5d6515a15d3e7 SHA-1: c6b98fff84112d46fc88d7fd75c6060fcb86037f SHA-256: d0ed1e59b54959d2dfbf291afd5222a46e6e60315e23a8cd7e021edff64491b1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of game hacks and free items, such as '2021 Free Spins On Coin Master'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this malicious redirection pattern. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/2021-free-spins-on-coin-master-game-hack PDF link annotation
    • http://sbm-nn.ru/images/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E2 25056 bytes
SHA-256: 837cdc7dc68ea1f0c1f3d75ba96f7c81c4c0470affadc7a32680bacee8d39038
font_01_sfnt_off00008170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8170 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5B 18288 bytes
SHA-256: 622f5559f42d42bdf895aa0dd0378bc93f6cb1528ecbdf5ac45ca29ab5b27cb4

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