Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e7d8638ad3b492…

MALICIOUS

PDF

46.8 KB Created: 2021-05-17 08:40:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 78776703419653a6b8fb8590c9d3ce00 SHA-1: ad30635986fb539b975cea84d571b8087d1bb1ec SHA-256: 78e7d8638ad3b492406583407c974df6bdb5ed6d3d068e653c81321015f2f7aa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, a common lure for malicious downloads or phishing. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/minecraft-mods-download-free-game-hack PDF link annotation
    • http://rainbowbuddha.academy/images/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn 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_off00004ab5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB5 28836 bytes
SHA-256: 9b943eb3323403e8241caad196ceec36030e818378aee3480710c9ecaaadc62f
font_01_sfnt_off00008ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC0 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off0000947f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x947F 18292 bytes
SHA-256: cdbcc94192cea0c1a32d76b4e8648406db092070658ebd9590606dd52a123660

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