Malicious PDF — malware analysis report

Static analysis result for SHA-256 81400411c237da9c…

MALICIOUS

PDF

49.0 KB Created: 2021-06-04 00:05:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bc2bc2e1577bbd978aaccecaf74dcdde SHA-1: 0203bc1e9185db07fceec19f1ded685d113013aa SHA-256: 81400411c237da9c7300c44189fae9bcee6c5e6d515fca837c15489371293e79
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 0.9796

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/406889139/coin-master-free-daily-spins-game-hack PDF link annotation
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E3 24520 bytes
SHA-256: 6f1494f3e8cb642d71025ba97a9bfe0bcf97e92274086febcf00d3984a89f8c8
font_01_sfnt_off000087b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B1 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off0000919b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919B 18308 bytes
SHA-256: 5c3cefeee4a209382fad51155f4ab19c665f35dca270fe96ae1b58d23c3d8f95
font_03_sfnt_off0000b3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B2 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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