Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59b978abf3b9994…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 18:03:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f1e11646960eb7362dce34981071dfd1 SHA-1: b6a137be4ade3dc6c5ef49ed7817356f35641d0f SHA-256: c59b978abf3b99947e19f1bb8671ae5b1ab351c32b5cb4a113e294d130a602eb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links that are presented as game hacks and generators for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of many such links indicate a lure to redirect users to potentially malicious websites. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/comment-cheater-sur-roblox-island-royale-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/pokemon-go-free-zekrom_GM1094591345.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-generator-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-egg-hunt-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/dark-dominus-roblox-codes-free_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-no-scams-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-know-if-a-place-uses-free-models-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-download-free-download_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
font_00_sfnt_off000030cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CF 22904 bytes
SHA-256: 8b8432d13904f342998dcf5bbd6ebe2999429c682e53ddb9c3c7f88146d7359d
font_01_sfnt_off00006438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6438 19508 bytes
SHA-256: 338292ca6ea6274bc279c6985a521549d212ffd6f8bfbe76e4e6734a775d2e85

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