Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e9002fbf8a192f…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 05:24:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fd62ac2841faa1fc54619f5bd2b3c40f SHA-1: 6be8d86d9efaa08aa2c32bddfe23b0a1045fee6d SHA-256: e4e9002fbf8a192f35ef651f39ccf9852ebec77b87c964a0042b43d5199f8cd3
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a 'link farm' technique to direct users to external websites. The document body and extracted URLs suggest a scam aimed at users seeking in-game currency or cheats for popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the presence of numerous external links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-robux-without-verification-2021-game-hack PDF link annotation
    • http://www.arichuna.com/images/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/can-you-get-free-robux-on-cheat-enine_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-get-robux-on-roblox-for-free-on-pc_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-hack-arsenal-ot-fly-roblox_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-ninja-legends-free-vip-server-2021_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_off00003057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3057 22572 bytes
SHA-256: 9ebe2289a11c69cdd1321504d1f2839d0dc008b46669020f0ce87656efdc80e1
font_01_sfnt_off000062ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CE 19840 bytes
SHA-256: b77f23397a098c4dc3ad9c6ed3599495bca59c8db3ab458779c0241217e21131

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