Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7a700c76b72dca…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 13:58:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b269c900a5f892122f51b5cb231d08b9 SHA-1: 57b38d06df355f281ae535df055bbb3d420bf53c SHA-256: ad7a700c76b72dca2c4dc213fbaac6dc245d2e0acc90049e24f0ae7f135144a2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, with a primary lure pointing to a 'free game hack' generator. This suggests a social engineering tactic to trick users into visiting potentially malicious websites. The ML classifier also flagged this PDF as malicious, reinforcing the assessment of a phishing or scam attempt.

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/daily-spin-coin-master-free-game-hack PDF link annotation
    • http://perpustakaan.idia.ac.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-make-a-roblox-audio-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/is-roblox-being-hacked-right-now-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-off-of-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-how-to-hack-badges_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-do-u-get-free-robuxs-on-mobile_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-mod-menu-apk_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_off000035a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A9 22752 bytes
SHA-256: 4441c6f3d998c64ae3907504955a7f2cccd78e9b360f1724234d4ea8bc1b587a
font_01_sfnt_off0000684d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684D 18596 bytes
SHA-256: dd2b15a0c253a0bf9d7b51e6ea282b6de13fefca925d00b562789186b018f21c

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