Malicious PDF — malware analysis report

Static analysis result for SHA-256 f290b52eca97d772…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 14:05:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3375d1098cc99d30d7414f366bc2dc0f SHA-1: dbbb95530ddc13129e90a0073883ae649cefe096 SHA-256: f290b52eca97d7722b5095189de76a6b68e4f1a400f92b03a817a897203f2ef7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.online/app/479516143/free-private-minecraft-server-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://youtuIn 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_off000051ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EA 25140 bytes
SHA-256: d5774c960f099069674f34c9e7a10abbb6b754876c9021ff5b70d73e19a359e4
font_01_sfnt_off00008b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 17836 bytes
SHA-256: 7ff77ee3a78605da9ef85fec4605ea670974ab48e4ca839a7389016eb6bc2a09

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