Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef10ea28e6f3bcb…

MALICIOUS

PDF

54.7 KB Created: 2021-06-03 05:39:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 98ebff15e59d9490375dfea7c9639933 SHA-1: 6e03ae66cb3c1e4c3bdb58eb1f3d7f2a079979c8 SHA-256: eef10ea28e6f3bcbb2be1f431053cb88feb42e8555a8331afffbdea3bf9a40b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9497

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/479516143/windows-10-minecraft-hacks-game-hack PDF link annotation
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-free-bc-generator_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/pokemon-go-free-shiny_GM1094591345.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51FF 24588 bytes
SHA-256: b8955a2b7c6fd7f452186a4b421315b27e0024cff0ab46f91be09b271d810594
font_01_sfnt_off00008a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0A 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off0000a334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA334 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C1 18696 bytes
SHA-256: 404a6a828e36ead2d4cd56abe684579086ad140455fa529c5546af7349081cf7

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