Malicious PDF — malware analysis report

Static analysis result for SHA-256 5161e93f0ab028b4…

MALICIOUS

PDF

47.3 KB Created: 2021-06-11 07:06:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4e8ae8bd772779bad093f0b280965608 SHA-1: 8dced02551eddf20391b7d24ff65277b7794e41e SHA-256: 5161e93f0ab028b45a7712d4978cd32628ec6038d34025322e1e1953a11c8bc8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that redirect to sites offering game hacks and generators, a common lure for malware distribution or phishing. The ML classifier strongly flagged this PDF as malicious, and the heuristics indicate it's designed to trick users into clicking on these links. While no scripts were explicitly extracted, the nature of the lures suggests a potential for further malicious activity upon clicking the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-roblox-games-on-computer-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codew_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-doge-mask-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-executor-free_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
stream_004_off00005200.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5200 30236 bytes
SHA-256: 14f11d3654c7a70cbf487469639dc4d758c9680073eddb8aaf497a6057d97c72
font_01_sfnt_off000094f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F9 18856 bytes
SHA-256: 14ea33a1a1e77d300b3e2b737569748e656ec4322e0c1c6d023b0852726ef412

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