Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86bb7144e160f8f…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 14:19:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 899e4ec7768a92cb11b93e8d658d14b2 SHA-1: dbc3d2a03ce79a6df9c0f6f338f297e213451fde SHA-256: d86bb7144e160f8fef10da6987f94f123eb727ec06107392f5124422cf51feeb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the overall pattern suggests a social engineering attack to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/noob-vs-pro-vs-hacker-vs-god-roblox-bloxburg-game-hack PDF link annotation
    • http://muslib.unmus.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-birthday-printable_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/download-cheat-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-servery_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-play-alone-esrly-acces-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-on-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-node-cheat-engine_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-accounts-2021-september_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacker-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-real-2021_GM431946152.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_off0000305f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305F 21964 bytes
SHA-256: cbe785d01b7236dc9825381c1fb1e29c0e5b9f50ad3e66fd67159c9b980c5ac9
font_01_sfnt_off00006102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 19260 bytes
SHA-256: 909b8385a7947050d1a18c4b0b55d74350718cb09c0cd29ebbd7c2ca7d817244

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