Malicious PDF — malware analysis report

Static analysis result for SHA-256 4446968bc9b3ad9d…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 20:59:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0baa64212e412dd5f18f708c4c5904a4 SHA-1: 947a207fe502e0395168bef4e6c5a625a0a09d6b SHA-256: 4446968bc9b3ad9d4f3e384bea885bfa3a0b7dc5d1cf8318e6f7a9c825a4a083
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for a game hack lure, directing users to the URL http://netcdn.tw/app/479516143/play-minecraft-online-free-game-hack. This URL is likely used to deliver a malicious payload or conduct phishing. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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/479516143/play-minecraft-online-free-game-hack PDF link annotation
    • http://opac.stieimalang.ac.id/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-artmoney-hacks_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/case-clicker-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/dragon-ball-rage-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/script-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-jailbreak-hack-money-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-on-android-2021_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
font_00_sfnt_off00003130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3130 22596 bytes
SHA-256: 8c9ac7f4def160bd43e623fadd78f371b57fb4cc7fc1c14a64811530de9d139f
font_01_sfnt_off000063a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 18264 bytes
SHA-256: 6af20249b3fc91c6ba778d93b5b7f70c4b9d84eb0b0988d9fc165060c8c986e2

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