Malicious PDF — malware analysis report

Static analysis result for SHA-256 256ef6493a2a0d6f…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 07:51:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 537cd39084c9db7f95eff0625d6509b3 SHA-1: dd6d5822445f8f504b4e4db66a3808a8b4f86d04 SHA-256: 256ef6493a2a0d6f0c087e42c82dfe3250ac50cc9ba6c31dcea6eedd2f616ad3
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 0.9832

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-dominus-roblox-2021-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/pubg-uc-png_GM1330123889.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/moon-active_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005221.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5221 30704 bytes
SHA-256: 079aab8ae8cf500272e54688d9ac38234e4f6b0301321c26b0e489f047d2a207
font_01_sfnt_off000093e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E1 19040 bytes
SHA-256: 7ceaa800297f2cffe2dc74970c760bef2dfdf9cd7972a4bc11bd5163862682a1

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