Malicious PDF — malware analysis report

Static analysis result for SHA-256 124a6d5af4cccd03…

MALICIOUS

PDF

51.2 KB Created: 2021-06-02 21:50:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c865a380e5a83c3a96d61b1f18a52b17 SHA-1: 91ada0db4db24aeb8051a85abd9c1a3a6dc5b35c SHA-256: 124a6d5af4cccd03ab81896a3ca84aec7ae901d024bbf3287de45e77ecbdccfa
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 0.9871

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.xyz/app/431946152/roblox-parkour-bag-hack-game-hack PDF link annotation
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/coin-master-free-items_GM406889139.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_off00005155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5155 38132 bytes
SHA-256: 8a23f55ca2b236f39ae452bfb1aebbebf58bca9cf7c7f84fefb77ec854b13021
font_01_sfnt_off0000a47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA47F 18764 bytes
SHA-256: f6cb14ba8b420bb7e70bf04bd6f0bee6ac4c16fd570e62ea19676c582a3f85af

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