Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6b482721832e41…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 12:58:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 69bf4b1b4a1d154548effc1dc7a3de9c SHA-1: 48b4138647abfde16ce8e338d3495706cd7a1f4e SHA-256: db6b482721832e418abae87a05e8faa514452a69f66da6be4ee3b84d548748c8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic flagging it as a malicious lure for game hacks, specifically 'free Robux codes'. The document body and embedded URLs reinforce this by pointing to external sites offering similar content. The primary IOC is the redirector URL, which likely serves as a gateway to malicious content or further infection stages.

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/how-to-get-free-robux-codes-2021-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/best-free-roblox-exploits-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacking-s-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hackear-roblox-server_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification-or-password_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cupcake-roblox-exploit-knife-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-terminal-railway-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-use-cheat-engine-64-on-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-without-verify-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/only-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-virtual-piano-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-promo-codes-no-human-verifycation_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheats-for-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/foxyhackscom-free-robux_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_off000032cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32CB 22932 bytes
SHA-256: 8c8ec33d1c7690ed53df9d48794f617b13d6292258515ed6835e4724bd19c110
font_01_sfnt_off00006613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6613 19560 bytes
SHA-256: 23fd6b1887025421e6e39521b650ee02de163ea1ebb303fc14ef8bd616b7f3d5

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