Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ecd92542e13209…

MALICIOUS

PDF

50.1 KB Created: 2021-06-08 18:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d7fb6ae01a017b89015ceb75c406e281 SHA-1: 0b8d1264d172de74915d9bae32b667ceb07e888c SHA-256: 31ecd92542e13209399e41766333aa11d51262a4548d112f9482b34ede09b6d6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lure users with promises of game hacks and free generators, specifically mentioning Roblox and Coin Master. The primary URL, https://netcdn.tw/app/431946152/glitches-for-the-hacker-tycoon-in-roblox-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to lead users to potentially harmful external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/glitches-for-the-hacker-tycoon-in-roblox-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-free-6-months_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/tiktok-free-login_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005475.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5475 26984 bytes
SHA-256: 88af774f76913c9c54ac00212ca5dc2c0c34b8da1df27f9aeecfac77f87fda59
font_01_sfnt_off00009268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9268 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F79 18916 bytes
SHA-256: 4f5fc1c54faa111c94f4120891758b59de46791dad49e570c163018bf558b384

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