Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a299c208e010d2…

MALICIOUS

PDF

37.0 KB Created: 2021-07-04 10:03:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cb8fd9a2a360de18a7c40894f548d685 SHA-1: a65c1e9ca0f82fe735d3e11c147c4b162e3e0db8 SHA-256: 87a299c208e010d24a7d49ad836e37776c0171fd5876ede1a45a5908b7acd58d
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 0.9981

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/431946152/free-robux-no-verification-game-hack PDF link annotation
    • http://pustaka.smpmuh2yk.sch.id//repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/tiktok-free-account_GM835599320.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/cool-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-hacks-free-spins_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_off0000393b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x393B 22508 bytes
SHA-256: 38b2611f7f0a4e651d007be9c28c8b0f5e2f1a1dba68fdeb11776a166c7e8717
font_01_sfnt_off00006b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 19072 bytes
SHA-256: ace71d10471f941b47a74757ee9bffc2eb087028e16fd0b67ae59ecc13578840

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