Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f09f64116bd8a9…

MALICIOUS

PDF

49.9 KB Created: 2021-06-09 06:49:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dbfbca8b8e4583f3d81aac8c5dc19b83 SHA-1: c240d71a9d75528a07dbd0a151e40fd1d5fa80dd SHA-256: f3f09f64116bd8a9f3b9a1d30d8cc0e5f5d65c9776d1d07574cc56cc4edd5dca
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a high-confidence heuristic firing for a 'free generator / game hack' redirector lure. The document body, though partially corrupted, contains text related to game hacks and a URL that aligns with the heuristic findings. The primary lure appears to be directing users to a potentially malicious site for game-related cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-mad-paintball-2-hacks-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-i-download-minecraft-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_off00005243.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5243 28624 bytes
SHA-256: cf3a6e3c908518f9d9a79e22f59abe74f32360cfb7929a39c9d38b912624d25a
font_01_sfnt_off00009478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9478 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E27 19056 bytes
SHA-256: a19bfc5f71f584dd762fc72d0f59c65bb99a1c8d328d16720488e804bc5cac27

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