Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51d712b06f5a547…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 11:22:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: df2e669d91b0900b80cb84835445d803 SHA-1: c9ff4b24b70560774858f1c28ab3cd78b71ff080 SHA-256: a51d712b06f5a5474c72bec025a633d95e0ba81f8b2f46061413497caeefc626
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it's a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. While no scripts were extracted, the presence of external URIs and the ML classifier's high confidence suggest a malicious intent to redirect users to a potentially harmful 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/roblox-hack-me-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-generator-no-human-survey_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/freerubux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pokemon-go-free-rare-candy_GM1094591345.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-wurst-hacked-client_GM479516143.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_off00003074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3074 22472 bytes
SHA-256: 188e1b9a30987047fecdfc7195a69495e7777753328639999f9e8d615a9680ba
font_01_sfnt_off00006290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6290 18852 bytes
SHA-256: ae5bbd1016d3eca5969145279625dbf0af4bdaae54505d1f649a6545bf5fde29

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