Malicious PDF — malware analysis report

Static analysis result for SHA-256 7629bff2f926c20e…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 01:58:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4a7f4513eeae0aa86462b543ad97c5ab SHA-1: 4cc704cbf454c80079b86e4ba67c7c38067ef244 SHA-256: 7629bff2f926c20e3e872584a528586bd62b3e796c717a4c99b39e428f4ce79e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The document body, though corrupted, contains references to 'Roblox Free Robux Hack' and a primary malicious URL. This suggests the PDF is designed to trick users into visiting a site that likely hosts malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-free-robux-hack-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/where-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/tiktok-free-coins-apk_GM835599320.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-robux-hack-generator_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
stream_004_off00004e3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E3B 24924 bytes
SHA-256: f68a698bb30f6ebb01a9c03e950cf884558e819473722ac4d6f5bf65697a87c4
font_01_sfnt_off0000873f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 18488 bytes
SHA-256: 44072fbb5c45a7604268a2c6438126b7db3492802a9c8847ecb07522db400813

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