Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05e99176417baf1…

MALICIOUS

PDF

45.9 KB Created: 2021-05-13 00:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 829af03564dc4399ab04d1a0ca9af28f SHA-1: aad2ea1a2f7fe49c6b2ee847f4aa298cd1060e2c SHA-256: e05e99176417baf1d0998ac9905672db4e242cdf20b1a3e999903e876233870f
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 0.9432

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/431946152/free-robux-cards-game-hack PDF link annotation
    • http://pustaka1.unindra.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-tiradas-gratis-2021_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
stream_003_off00004863.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4863 26144 bytes
SHA-256: 43d17c5d689ba59a9485c89e098f1691e2997268faeaf6ee47dc5de5d28511d6
font_01_sfnt_off000084d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D5 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00009077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9077 18416 bytes
SHA-256: 79c56a0f23d4fc34690a575a065be14b64911c3c5a3331038291264b4b7107af

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