Malicious PDF — malware analysis report

Static analysis result for SHA-256 397725fa8fd47fc5…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 13:32:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 009be0d7b298b5f339be8577c107b4fd SHA-1: 96a9b3c1febf342316d57ddcd31b7ebd918ca118 SHA-256: 397725fa8fd47fc585cf67e69093b5d39a8f5f8c6fc8562598b9e01339d30c7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering game hacks and cheats, specifically targeting popular games like Roblox and Coin Master. The primary redirector URL, http://netcdn.tw/app/431946152/how-to-hack-into-peoples-roblox-accounts-game-hack, is flagged as malicious. This indicates a social engineering tactic to lure users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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/how-to-hack-into-peoples-roblox-accounts-game-hack In PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/art-money-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/speed-hack-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-hack-minecraft_GM479516143.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_off00002edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDC 23004 bytes
SHA-256: 62f6247da4ab6621ca31759c5cbb3d0ce6efae234a9876cf62838719180da668
font_01_sfnt_off000062ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BA 19392 bytes
SHA-256: aaa14d57270f8b49922102805340abb957b41bf41db99b64e7f76b20a92bc2c4

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