Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d09cf46b639f03f…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 08:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 12b04e62c4d3c3755be96fd8c3687196 SHA-1: 4a095699737d2aadf844896641ebdf10c88c0952 SHA-256: 6d09cf46b639f03f583fd64de984f7ca589649f2023e7c389f771113922e687b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic firing for linking to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/i-want-free-robux-game-hack. The document body and numerous extracted URLs reinforce this theme, focusing on 'free Robux' or game hacks. This strongly suggests a social engineering lure to trick users into visiting a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/i-want-free-robux-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-download-roblox-on-ps4-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-2021-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hack-ninja-simulator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-neon-blue-animal-hat-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-bee-swarm-hack-for-treats_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-daily-rewards_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE9 22552 bytes
SHA-256: 646acb14304f74781de7b47bd00730ebfafa08adb5a44f9c99389688609ed524
font_01_sfnt_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 19020 bytes
SHA-256: eae9f8d08779fd2c5c3bd60eb75d4d29ea8b13925606d89c315f12075b4b7800

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