Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe426ace39f60fc…

MALICIOUS

PDF

50.0 KB Created: 2021-06-08 22:57:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9f54ef3288d77d4c500f254adee15e6b SHA-1: ca75fd92e77acdf9fd42a43d7404c775e5022fa7 SHA-256: 4fe426ace39f60fc52cdf5b89fdd1b9661d8bea00772f5812678166787874e45
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering 'free Robux' or game hacks, presented as a lure. The heuristic 'SE_FAKE_CAPTCHA' indicates the document likely displays a fake verification prompt to trick users into interacting further. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a malicious workflow aimed at redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-robux-no-saving-game-hack PDF link annotation
    • http://stikgiamakassar.ac.id/digilib/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005525.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5525 27988 bytes
SHA-256: 52f0afe8041a0c919d9b54c1e6f633795d9e21b3953424f219e815741d424f84
font_01_sfnt_off000095e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E2 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off00009f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7D 18764 bytes
SHA-256: f976baecf764f01b4998b564af59b6b5e9f036ef9c9aa1a7fd1bb80db9bec3e7

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