Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db593acbb974d4d…

MALICIOUS

PDF

35.8 KB Created: 2021-06-29 06:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c15cc8e1057e8f201ceb16afdff276ea SHA-1: fe214adca97d73e159a05e8e6377c10d60f460da SHA-256: 2db593acbb974d4dd0f3faed6aa6d90fb451a1d89a5cff625c8fc0766760cb1b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free gift card codes for Robux' and 'game hacks'. The primary link, http://netcdn.co/app/431946152/free-gift-card-codes-for-robux-game-hack, is flagged as a known malicious redirector. The document body and embedded URLs strongly suggest a lure for users seeking in-game currency or cheats, which is a common tactic for distributing malware or leading users to scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-gift-card-codes-for-robux-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/bloxfree-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-birthday-party_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/mm2-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-roblox-glitch_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-premium-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/secret-robux-hack-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-app-how-to-delete_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-make-free-shirts-on-roblox-without-bc-2021_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
font_00_sfnt_off000033a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A0 22828 bytes
SHA-256: fbe888dd4cf478a17253f411c2ad8a8282dcfa160bc69c8e16ca19666e08c1d8
font_01_sfnt_off000066b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B3 19112 bytes
SHA-256: 556e8558de070a2e1eb44d9676ebcf2b2b20c0497be16b8109bfcc6932f4c185