Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3dbcc9c5de62b0…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 14:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 764e4161d198a5ca1966514632df8f12 SHA-1: bf52ea2daa3042398ac22e1c97b1f47bc0ed20ab SHA-256: 9d3dbcc9c5de62b04345b620382df864cae3a926a80f59f40b02812a4fa5edd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency or hacks, directing users to a known malicious redirector. The embedded URL 'http://netcdn.tw/app/431946152/free-robux-no-verification-or-survey-game-hack' is associated with malicious redirector infrastructure. This suggests the document is part of a phishing or scam campaign designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/free-robux-no-verification-or-survey-game-hack In PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/free-robux-without-survey-and-human-verification_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/ww-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/roblox-how-to-hack-robots-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/easy-ways-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00002c9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C9D 22632 bytes
SHA-256: 3a583bd98e8ab43fbef6b310ca5c38f016c4987f8607a51cfffa735f514b842b
font_01_sfnt_off00005f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 19368 bytes
SHA-256: 551afc8435a3263a9a14f68c6fac56cdd03dabd4713ff120a4b3cc718d9f39ef

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