Malicious PDF — malware analysis report

Static analysis result for SHA-256 0665993408fdcc54…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 12:23:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: baf6f03b0a1efe0425a7858aa8243d36 SHA-1: 0f7408f91e1f2aaedae94cccde7b437780e8795d SHA-256: 0665993408fdcc54eb2f4f22fae78f840d7713f2ff50a679375c5f7efbed1d6c
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 0.9980

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/406889139/20-free-spins-coin-master-game-hack PDF link annotation
    • http://opac.library.uib.ac.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-vouchers_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/aimbot-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/cheat-engine-roblox-infinite-health_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/pokemon-go-free-account-2021_GM1094591345.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-many-levels-are-in-coin-master_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_off0000320d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320D 22792 bytes
SHA-256: dd7c34f03899765fd3ae2fa880863a7cba145d0c67d7dd1ed657f9b8c4ac9b17
font_01_sfnt_off0000650f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 18472 bytes
SHA-256: 9bbada0425f487f3c4a68143d9c445a4c5f68259678acbb3e596bfcd884a6068

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