Malicious PDF — malware analysis report

Static analysis result for SHA-256 473e6f0ccf292a92…

MALICIOUS

PDF

48.8 KB Created: 2021-05-11 21:01:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6cc617e378484b8fcc76985af5b41501 SHA-1: 6fda8aa69c49661afa8373ab3d99ec19425f896a SHA-256: 473e6f0ccf292a92aabf851f4dd1aceb83e535cd4d815ffef018e21cb41e0ea7
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on 'netcdn.xyz', which is flagged as malicious and associated with game hack lures. The document body, though heavily obfuscated, contains text related to 'Coin Master Hack 2021' and a URL matching the malicious redirector. The presence of embedded URLs and the nature of the lure suggest an attempt to direct the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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-hack-2021-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-minecraft-account-and-password-generator_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_003_off00004b6b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6B 25048 bytes
SHA-256: 3491ea758f4815c368f889bd02256102a5f1b635ee84d769ee22259b375f81ae
font_01_sfnt_off0000840e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840E 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9898 19444 bytes
SHA-256: cd7d042f017e29ed2c3577c1eafe7c90b8e93ad1b0ffe024495cb6450558cd34

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