Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8de5a453a0e4591…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 09:30:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 516ecd1816b7d5aa4556c2f8065fc4a3 SHA-1: df215ee02427b3d5246bb7c0729f0d371f9065d2 SHA-256: f8de5a453a0e45918cc7a772577614b37456cfd20355e42ff575f4cfebe608a4
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 0.9769

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/431946152/free-robux-no-survey-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000518f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518F 25380 bytes
SHA-256: 8fa6335d17769b9f46ebb51f28b5bc5ccebd179a29fd40e50589cb7b32d43b43
font_01_sfnt_off00008cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD1 2836 bytes
SHA-256: e6aea2daa5db9355830a9a968e1dd4db55accb324ce868326bbb9f42b5e0b8b4
font_02_sfnt_off00009676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9676 18308 bytes
SHA-256: d3a10f634c5ecc3d7353c949fdf4d39280fe41fff4e373acd575ae0d5bea3c9d

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