Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c5e4ac4f576e1d…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 23:02:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eb864968c179870e329e425449b530f1 SHA-1: 3a4d612e2f6cf951f048ab57a31147762a2f5534 SHA-256: 46c5e4ac4f576e1d0fc7e62b7e1ce17c250068af91c443e54eadc23d3fe85309
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "free generator / game hack" and displays a fake CAPTCHA to trick the user into interacting with the document. It embeds multiple URLs, including one pointing to a suspicious domain, which likely serve as download locations for malicious payloads. The ML classifier strongly indicated maliciousness, supporting the observed social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/free-coin-master-spins-2021-link-game-hack PDF link annotation
    • http://lib.mbp.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-hack-program_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_003_off000048ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EF 25480 bytes
SHA-256: 3507d62f380c7c6f37cc35b87a102d945094dfb796ae009932521d2d99f90692
font_01_sfnt_off00008253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 18456 bytes
SHA-256: 5afa98feccd95d8eb179cf82941ba5e9245b2aa88804d11c8626ac43caff3152

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