Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be1eb7b350815cc…

MALICIOUS

PDF

46.2 KB Created: 2021-05-15 14:44:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2fca52d053a3c17ef420b73cbc9fd9e3 SHA-1: 873005f296eb14747c64c58d48db939573e32651 SHA-256: 9be1eb7b350815cc2bd94ed9267db2a26e0fdc4388b95cd13f646d5566af5dfa
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick users into interacting with malicious links. It also features a large number of external links, many of which are SEO-optimized and point to scam-related content. The primary URL identified is https://netcdn.xyz/app/431946152/free-robux-no-verification-2021-game-hack, which is likely the destination for the fake verification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9525

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-no-verification-2021-game-hack
    • http://ce-tsv-nantes.fr/images/minecraft-rtx-download-free_GM479516143.pdf
    • http://ce-tsv-nantes.fr/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://ce-tsv-nantes.fr/images/get-roblox-for-free_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/minecraft-switch-free_GM479516143.pdf
    • http://ce-tsv-nantes.fr/images/how-to-get-minecraft-realms-for-free_GM479516143.pdf
    • http://ce-tsv-nantes.fr/images/how-to-get-free-robux-app_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/robux-generator-no-verification-needed_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/free-gold-cards-for-coin-master_GM406889139.pdf
    • http://ce-tsv-nantes.fr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/minecraft-online-free-download_GM479516143.pdf
    • http://ce-tsv-nantes.fr/images/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/coin-master-game-hack_GM406889139.pdf
    • http://ce-tsv-nantes.fr/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://ce-tsv-nantes.fr/images/robux-website_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/free-robux-that-actually-works_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/apps-to-hack-coin-master_GM406889139.pdf
    • http://ce-tsv-nantes.fr/images/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/roblox-free-login_GM431946152.pdf
    • http://ce-tsv-nantes.fr/images/coin-master-hack-no-survey-2021_GM406889139.pdf
    • http://ce-tsv-nantes.fr/images/free-coins-coin-master-today_GM406889139.pdf
    • https://www.roblox.co
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004841.bin
720b2aea032be38a2835701f6520f28bc1292e2e44ce5893f46bd18d20e03554		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4841 25640 bytes
font_01_sfnt_off0000833c.bin
63a179d8a9645bea05c6d53b1776faf4e4a7281930de6cf484e639846bec2e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 3656 bytes
font_02_sfnt_off00008ff5.bin
d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF5 19004 bytes

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