Malicious PDF — malware analysis report

Static analysis result for SHA-256 432687d1bdb77de0…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 04:51:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5178d50c871bb5c7657c8983f236ccc6 SHA-1: 2db5f97be276784b7f72e34ef0150940db6c018c SHA-256: 432687d1bdb77de0ffa64cd9c0a0a22bd97dbf33e9f3bbadb86c7a9d54c6ce61
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' related to Roblox, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/roblox-vehicle-simulator-money-hack-2021-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/i-got-free-tbc-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-roblox-codes-2021-july_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/trailer-roblox-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-jailbreak-telport-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-into-your-friends-roblox-account-with-robloxsecurity_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/what-is-the-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-the-floor-is-lava-free_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/prison-life-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-hack-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-ghost-hack-download-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_off00003164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3164 22080 bytes
SHA-256: 3e43733a484864f7cf9721887b8d0c8368e724f0b1ea147020ea3f4faa33add3
font_01_sfnt_off0000620d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 20356 bytes
SHA-256: f84ecd9a8748aee0545b22c0106a29131a697076228218cd255279e1c93d1d17

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