Malicious PDF — malware analysis report

Static analysis result for SHA-256 654f3980f8d0d8cf…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 07:11:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c2eb4aca9d9ba6585efaaeb95fc1834c SHA-1: 14a68952fb69d6b2c348c0698d010000c7f0011d SHA-256: 654f3980f8d0d8cf5f16dda8e0b14d2ff1f7def08b527bd42496bd5a63c62177
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure and malicious links designed to trick users into visiting a website that offers game hacks. The primary malicious link identified is https://netcdn.online/app/431946152/roblox-fly-hack-game-hack, which is associated with known malicious redirector infrastructure. The document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/roblox-fly-hack-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.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_off00005135.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5135 25024 bytes
SHA-256: 1d35765fdc21177da5fde6a2a44317c1f851ee6963bc41fa42b75502c03bebda
font_01_sfnt_off00008aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABA 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off00009467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9467 18528 bytes
SHA-256: 48aa5298b09ebe1486756ea90f1095ff6b224374f32c9ff4b9ed1390be9ca915

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