Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ce43de9f0db926…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 14:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 906425b0415e8168685ef4f0c87ee1bd SHA-1: a1503003b9f869d08988099148e0ebdebb043456 SHA-256: b0ce43de9f0db92611465c92735a7471ab04a70713f91d013bbe4fd8a6e90510
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically for Coin Master, directing users to a malicious URL. This URL, in turn, hosts another PDF file, suggesting a multi-stage download or redirection chain. The ML classifier also flagged this PDF as malicious, reinforcing the suspicious nature of the content and its associated links.

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/how-to-play-coin-master-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/moon-active_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-no-verify-2021_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_off000049cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CF 24996 bytes
SHA-256: 90e1e69002fde2b683a77a023622a5ce7e578ff9c4618c97f919bf99563c30f5
font_01_sfnt_off00008246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8246 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8 18116 bytes
SHA-256: 0e8b5a9117de41a6d4fd5ecb0cd728d284290b6e916b566678616dac1dce6f04