Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d501ec1bbe20f90…

MALICIOUS

PDF

49.1 KB Created: 2021-05-14 08:17:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8331e83636ffaf9e30e238440593ddcf SHA-1: a81e1a1626694c7a49b8684021051bdd447d98a9 SHA-256: 2d501ec1bbe20f90f722308ebd62d9e0e0623726931c8fa74ab7f98711a6147b
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 0.8642

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/coin-master-cheats-for-free-spins-game-hack PDF link annotation
    • https://hotelartskathmandu.com/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/app-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-attacks-coin-master_GM406889139.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_003_off000047f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F3 24120 bytes
SHA-256: 8edf09760dde3830aa4caf7cf0e0fff8e964851adaeae46e3446da6dd617baa1
font_01_sfnt_off00007ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECD 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off000089a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off00009e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E32 18052 bytes
SHA-256: 78e09613e9051ea2c05113a2cb3e2459165660dd7357248de65be6b789990433

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