Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9b35c48d4f4d48…

MALICIOUS

PDF

35.3 KB Created: 2021-07-09 03:22:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4da85367e652e549a1cf3c6b22169c72 SHA-1: e33f85eda56ed1367a6a770261857897d98df5da SHA-256: 2b9b35c48d4f4d483af6fae1ef51c57675d837ebc9cf71d2c9b5fe001133746e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/free-robux-discord-game-hack. This redirector is likely used to funnel users to a malicious site, potentially for credential harvesting or malware distribution. The document body and heuristics indicate a lure related to game hacks and free currency, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-discord-game-hack In PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-account-roblox-login_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.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
font_00_sfnt_off0000319f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319F 22752 bytes
SHA-256: d5049ac227827290324696130b8e7df94380da40192514f3f99a96107f69bde4
font_01_sfnt_off0000647c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 19176 bytes
SHA-256: 020ce166f16710322681f054c1b4dde0a486d6154bce33e9144977aac3b53b16

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