Malicious PDF — malware analysis report

Static analysis result for SHA-256 356a5457ab734a16…

MALICIOUS

PDF

52.9 KB Created: 2021-06-03 12:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d18b97931c049e9d631e3c0d7592e26a SHA-1: d6f4373d0b63a2a501284bf0d762e45949d254b7 SHA-256: 356a5457ab734a16bd2216a7661c115c8b2dbc23dccc67580d18d22c8035f7ee
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 0.9657

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/406889139/coin-master-free-spins-and-free-coins-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000546a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x546A 26144 bytes
SHA-256: 6cda0d82de10fb521a69295a39aadb468d09f85c02c234f42fefb385755c3428
font_01_sfnt_off000090d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D2 2868 bytes
SHA-256: 00109425b76763440a5569341faade0445b3c9f8514523a6f287fddbc9082efe
font_02_sfnt_off00009aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABA 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off0000acd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD2 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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