Malicious PDF — malware analysis report

Static analysis result for SHA-256 f869c6bd71e5e0cf…

MALICIOUS

PDF

48.5 KB Created: 2021-06-14 01:58:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d77b5641de06a42dcd6acd4aad6dae9c SHA-1: 1069fc6e5cb3dafb929eab6f6e5d7aa862901eb8 SHA-256: f869c6bd71e5e0cfed306a335e7dd46041088aeab5c63b6bc25141051dd21bd6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacking, specifically for Roblox, directing users to a URL that likely hosts further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs associated with game cheats and hacks reinforces the social engineering aspect of this attack. No scripts were extracted, but the document's structure and embedded links suggest it's designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/how-do-you-hack-someone-on-roblox-game-hack PDF link annotation
    • http://artistaone.co/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/weird-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/www-robux-us_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-robux-without-doing-anything_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
stream_003_off00004bbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBB 33224 bytes
SHA-256: bfa09be33bf50ddd9ac45a57122458b62dce3dd8668a44a9c1b033f730bf8a22
font_01_sfnt_off00009967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9967 19076 bytes
SHA-256: 43efb4d69f748d2df1c0a5b0a1c1a2aa96b4379c2625b8d483fa307e71c6442f

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