Malicious PDF — malware analysis report

Static analysis result for SHA-256 f830ccd51564d097…

MALICIOUS

PDF

42.8 KB Created: 2021-06-07 18:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7adf7565f7f398f6bafd93250b96290a SHA-1: ccbea55010626abd527d8d2e70e6a095676b68ce SHA-256: f830ccd51564d09721ce5e290edc772079ffa4215993301e2d2f1bfcfdc9a67e
82 Risk Score

Malware Insights

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

The PDF file contains a lure for game hacks, specifically mentioning Roblox and Coin Master, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it's designed to redirect users to potentially harmful content. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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 https://netcdn.tw/app/431946152/alone-roblox-hacks-game-hack PDF link annotation
    • http://solidcommunication.ch/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.roblox.coIn 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_off00004e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E56 24160 bytes
SHA-256: 07b7e7e4995e53eee254ef640792baf6e61fc43a126b04782eb49be558439d70
font_01_sfnt_off000084a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A4 18184 bytes
SHA-256: 24a0749c70d626e523bbab5b6ee2f39cf7a318ed989ce84233a8bb05c5213daa

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