Malicious PDF — malware analysis report

Static analysis result for SHA-256 df40a58bbadbcaa3…

MALICIOUS

PDF

42.3 KB Created: 2021-06-14 00:10:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ed24dcd7289598feb1ac90cc17b4b590 SHA-1: 878bc83294430e48521470bcd2d200f2759d22d0 SHA-256: df40a58bbadbcaa33f56d9eddaa01865b05cdf387b566fbc356b81ab5f548c25
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, identified as lures for game hacks and free currency. The ML classifier strongly flagged this PDF as malicious, and the heuristics indicate it's designed to redirect users to potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent, likely leading to phishing or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/earn-free-robux-scam-sites-game-hack PDF link annotation
    • http://ines.co.rs/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-jailbreak-how-to-get-free-money-used-cheat-engine_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-hack-top-model_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-btools-hacks_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/boku-no-roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/can-you-get-robux-for-free_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_off000047f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F0 25020 bytes
SHA-256: 6c877108f35b36c0fb20f5afcd397c238784020d10a3451e0bbd8e84cde59375
font_01_sfnt_off00008188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 18724 bytes
SHA-256: e351d65499a15cb32c79cec2fd2ae64122d08af4d119f448614c5bef5485b612

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