Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4077c70a46b7c3…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 06:56:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2798c5fd0c3f8ad5c2ef55cfc5bae7b8 SHA-1: 115258c66ce715f744a36553ece25f08ec98550a SHA-256: ad4077c70a46b7c3f6f103ae1dc213e1416dcc9eb8de9ad095ac193d3b6bbb4a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack lure, directing users to a suspicious URL. The document body, though heavily obfuscated, contains text related to 'Free Robux Hack Generator' and the same URL found in the heuristics. This suggests a social engineering tactic to trick users into visiting a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-hack-generator-no-human-verification-or-survey-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/find-free-download-of-roblox-zombie-rush-for-windows7_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pubg-uc-400_GM1330123889.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-spins-on-coin-master-hack_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
font_00_sfnt_off0000503e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503E 24540 bytes
SHA-256: dbf266b6e742be9e538ff4f212f6b37980ed02aa9615ad32b63ff7f094b5f745
font_01_sfnt_off000088c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C1 19324 bytes
SHA-256: c92bc81ece0481a812aebf4ae12ca76bc58fee0d9da7c94c92a17dd09874865f

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