Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f28d47e5a79087…

MALICIOUS

PDF

33.3 KB Created: 2021-07-03 13:00:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dca292fdd42a993905b28f80acaba247 SHA-1: 3caaede29386f772fe66a28b91ffdea756e90db1 SHA-256: 91f28d47e5a79087f0fec2731b65c12f7e428052a1390be8ffeeb01cb1fe3a2d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'free generator / game hack' lure. The document body also contains references to game hacks and generators, reinforcing the social engineering aspect. The primary URL, http://netcdn.tw/app/431946152/roblox-free-followers-game-hack, is likely the initial landing page for a malicious payload or scam. No scripts were extracted from this sample.

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/roblox-free-followers-game-hack PDF link annotation
    • http://librarysenior.com/repository/free-roblox-like-game_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/claim-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-hack-into-roblox-and-get-builders-club_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-now_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack_GM406889139.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_off00002c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C15 22248 bytes
SHA-256: ac6eecfa0974029538a72b34dec64944609dd2a584c80a9caf9800c3f902d6df
font_01_sfnt_off00005dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBF 18812 bytes
SHA-256: dc9bf45809a21e5382c525c50e290b17f7eee9daad7f3bff19b6beee526fce4f

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