Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b5120a7da4d771…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 04:27:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ed8faf627b9a5d6b5b769ab5fb7d045a SHA-1: 9b750143bedd7122ae43e52964d034b849605b6c SHA-256: 40b5120a7da4d771b77d513e5ee8e1d1fd24f97b4cfbdd797414c613e13f14db
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, advertising free in-game items for popular games like Roblox and Coin Master, to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/every-free-thing-in-roblox-game-hack, redirects to a malicious site. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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/every-free-thing-in-roblox-game-hack PDF link annotation
    • https://www.ugericabs.com/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/como-tener-mas-seguidores-en-roblox-sin-hacks_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/simple-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/free-followers-no-survey-roblox_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/free-roblox-close_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/robux-hack-2021-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.ugericabs.com/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master-game_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
font_00_sfnt_off000030c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C1 22100 bytes
SHA-256: d80429b5c9816943537d1941ea99aa0c45c7b2cff357c81c5e01b46858181df1
font_01_sfnt_off000061c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 19044 bytes
SHA-256: 82749e5984d6ab53e3ae4928eebdaf1c33569e7541f75f9104c3a3a7267b63b5

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