Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3dcc553d253184…

MALICIOUS

PDF

36.0 KB Created: 2021-06-29 21:07:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 88b12c4e03e9a91861416a3e7c0c66d4 SHA-1: 2c7c40aa00dbefa7d232f8f06722965e24be7918 SHA-256: 2b3dcc553d253184b1fab9323acdfffb3c0e423b952f9172e36c7ada14373e56
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. This URL, http://netcdn.co/app/431946152/free-robux-without-sever-game-hack, is likely part of a malicious campaign to trick users into downloading malware or visiting phishing sites. The ML classifier strongly supports the malicious verdict, and the presence of multiple game-related lures indicates a social engineering attempt.

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/free-robux-without-sever-game-hack PDF link annotation
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-games-without-password_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-free-glasses_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/pokemon-go-free-coins-android_GM1094591345.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coun-master_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-game-online-to-download-roblox_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-hack-roblox-with-lucky-patcher-2021_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-by-doing-surveys_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/gladiator-simulator-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-a-free-dragon-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-spins-daily-2021_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_off000033c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C5 22628 bytes
SHA-256: 4377cacc70637f631509601f48a648c0fd38557128511d2195b357953e3acee8
font_01_sfnt_off00006680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 19416 bytes
SHA-256: 8a279e374fbfb2f7a97973d730bd0de11e79954b5b52eaee6bd1a2d019ec4e52