Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a4a2e6823dda10…

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 00:17:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fdd4cfe68817bffc49062463afa25877 SHA-1: 3657af44921783cf2f49f02ebdfc9d76695e2121 SHA-256: 58a4a2e6823dda10ab265c8cd799e3a75546962c1d13dbb4e63424d19dffeceb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://netcdn.xyz/app/406889139/hack-coin-master-game-download-game-hack PDF link annotation
    • http://librarystkippgribl.com//repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/toolbox-premium-apk_GM479516143.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_off000048fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FA 23780 bytes
SHA-256: 575fc909e974dcf08f4fe62766d95bccef51cc2d05a268b466ef395aaa676bcf
font_01_sfnt_off00007f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 18556 bytes
SHA-256: aaade648ef56f1f9167d0db62f5c53722f102658163b7711b8d17774315d1610

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