Malicious PDF — malware analysis report

Static analysis result for SHA-256 542eb5fdf3de0034…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 04:31:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 62e34d2b77108a799090579a267e416c SHA-1: 2869322b0e8b8c8a50e98fcf1309dc1a2d01ef24 SHA-256: 542eb5fdf3de00340f1885456e100bb5150b96ff5657af4d82a26d521cc2d166
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 0.9971

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.xyz/app/479516143/hack-client-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-download_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-attacks-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
stream_003_off000048d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D2 26244 bytes
SHA-256: ac684adc6c6c21af41b33d6cf76b8a1671884391a8aac55a49a38a21415f9648
font_01_sfnt_off00008372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8372 17812 bytes
SHA-256: af75091dd1ed9ff92a17a8bd9a3d097f77d0b86e0c60fbcf01e38630a3bb1c5f

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