Malicious PDF — malware analysis report

Static analysis result for SHA-256 655b092bc08b3a68…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 08:34:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5eedc30fc5a5bc1dc5235320d5e5bdff SHA-1: 1f1a3494a5d7decd48958c78f2efd1f9681a6a96 SHA-256: 655b092bc08b3a688220342e6b63dc50ba8fbaf89769d81166209c789de4288b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/cartoon-roblox-character-free-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-2021_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
stream_004_off00005127.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5127 27280 bytes
SHA-256: 7c547cbb43b0afcb6889ecc55facb77b2a445c2e13bbeb0059d4cf3272270190
font_01_sfnt_off00008ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECD 18448 bytes
SHA-256: cc0e90a5e81610ededa607fd41cc662e0def223f80307d607b0187a9af80d437

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