Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf5f33bcafc891e…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 04:59:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 312a594546d7f05bf5feb39fed6d5390 SHA-1: 82643845136ef71f911faa78efb3d0ce99dce0f2 SHA-256: dcf5f33bcafc891ee62a5baae0397387a829841b8d779139771335d7010ff31f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that are disguised as game hacks and generators, specifically targeting 'Coin Master'. These links redirect to malicious websites, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-cheats-and-hacks-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-roblox-intros_GM431946152.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_off00005230.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5230 26120 bytes
SHA-256: 32e59d40b3ffd846117739365f8c129248b3e13d491399e68e45570b713eefdf
font_01_sfnt_off00008d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D30 18056 bytes
SHA-256: 273faeb993e3ec84ab967565c1959c967c02fadeaf14dd0f56592a6134979e3e

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