Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44a24c4dd3a4ba2…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 03:29:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e8da9fc4b6cfd20402dc51a347995371 SHA-1: 88eedc85a76b47f1c369e0a5c64c05514ab6a5f9 SHA-256: a44a24c4dd3a4ba26ae526bc1b1df5f489ddcef144053bfd19586e2882a06b22
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 0.9980

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.co/app/431946152/break-free-roblox-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/roblox-assassin-knife-hack-spawner_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-stuffes-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-welcome-to-the-neighborhood-of-robloxia-v4-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacks-for-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-granny-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-download-a-swearfree-roblox-speech-pluggin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-accounts-in-game_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-free-download-windows_GM479516143.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_off000030c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7 21896 bytes
SHA-256: 9f13957243b2b4715599fc1b210550b1a9e3b02a3c916e2eaebce19579b9af1a
font_01_sfnt_off000060c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C1 18820 bytes
SHA-256: 96a23a62b6ff3dc22dc831f36cbce4ff13849c84610a7b86dbe3facdc214f8b3

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