Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff37cee030056059…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 01:07:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8f65d2de9891c20a064801801cf4c8b6 SHA-1: 2b819c00b6b353c4af850d8d5538f59b39a6ef99 SHA-256: ff37cee030056059854a19cd749a099170c66a9434e5c6b5a93f2b9a658d971d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are disguised as game hacks and generators, a common lure for malicious content. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. While no scripts were extracted, the presence of these lures and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful sites.

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.co/app/431946152/free-sites-like-roblox-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-aug-8-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/skyline-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-code-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-bubble-gum-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacked-my-instagram-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/gas-station-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-awards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-hack-no-on-roblox-email-or-no-password_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/when-is-hacking-day-for-roblox-for-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-for-free-fake-ptomocodes-that-give-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-from-obby_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_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 22476 bytes
SHA-256: c7874f0e2bae94f486bda3d897ec2916704646fe52c50615ae5c0165ce1a483a
font_01_sfnt_off000061eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 19044 bytes
SHA-256: 44b7c663eed575399b6feab7f1d8353d020fe3d5fb86e58feb3c3aa8df4ea34a

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