Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97a53549bf3c9df…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 04:10:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 076712db5f7e3f926b991f8f3df9ecc2 SHA-1: 45c026a29041dc9309716523db379fe8804b5391 SHA-256: d97a53549bf3c9df25426b815e9f8dfdd0266a255c6d27e3696a46055a4d9b1e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL associated with game cheats. The document body, though heavily obfuscated, contains references to 'Free Coin And Spin For Coin Master' and the same malicious URL, reinforcing the lure. This suggests the primary goal is to trick users into visiting a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/free-coin-and-spin-for-coin-master-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/mcpe_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-hack-pubg-mobile-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-client-download_GM479516143.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_004_off000052db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52DB 24716 bytes
SHA-256: af7af6be28617526f312f434bef2931dcee646327e713fae094ef4261775c9fe
font_01_sfnt_off00008b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9B 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00009586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9586 18060 bytes
SHA-256: 42d2e7759bfcfecd447a46542d8809f4e944f7c9df23d0847fbb4c7837fae2b0

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