Malicious PDF — malware analysis report

Static analysis result for SHA-256 1761caa65e1edcd9…

MALICIOUS

PDF

36.9 KB Created: 2021-07-09 16:44:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9652b22295c3aee9a1b5f245b66c8140 SHA-1: c4cf5cda7674b29a012f53d6596565639de681b4 SHA-256: 1761caa65e1edcd942299d91c9cf87e2c7706c4bca4e875cac5099178c2eb9cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a common lure related to obtaining free in-game currency for Roblox. It contains multiple links, including a primary redirector URL, that lead to websites promising game hacks or generators. The ML classifier strongly indicated maliciousness, and the PDF's structure and content align with social engineering tactics to trick users into visiting potentially harmful sites.

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.tw/app/431946152/can-you-get-free-robux-on-roblox-game-hack PDF link annotation
    • http://www.myresidence.lu/userfiles/files/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-london-map-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/the-best-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-a-free-vip-server-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/attack-on-legends-script-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/pubg-uc-carding-quora_GM1330123889.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/bucks-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/inject-hack-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-coins-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-free-robux-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
font_00_sfnt_off00003730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3730 23068 bytes
SHA-256: a97359ab9cfe63caba878a54a329ad2c00a5635f80270fc74e02cb8a0026238f
font_01_sfnt_off00006b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B33 19056 bytes
SHA-256: 212cafc25ec0536741ac5c1aa90543f36b34a777adc44243741e4ba36ab4d37b

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