Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aba38ea014fe8bc…

MALICIOUS

PDF

50.6 KB Created: 2021-06-03 06:42:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4229388fdfd3e4c6b3744d5f4b9c8385 SHA-1: 32e7e9621225c6e3e264f85fb7253423745e72cf SHA-256: 1aba38ea014fe8bcf4bcacb035884650993e4443a4c386fd09f13f4bdefbcc47
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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.online/app/431946152/free-robux-no-survey-or-human-verification-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005662.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5662 28580 bytes
SHA-256: ccbfcde99f380112bef5337037ca99627ec3d3e7c9f196c420bfcc5b488d8e95
font_01_sfnt_off000096c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C7 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off0000a074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA074 19156 bytes
SHA-256: 740843b016d65d6d98e94234348adfc338e782053996300107113ffe61ddc4f5

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