Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e1bb7bcc722278…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 08:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bc5b2c78bddcc527c46f9070e2fd3701 SHA-1: 70f0eee742d690665be3438ee6c287142174ccae SHA-256: d3e1bb7bcc7222781b5b7f4682d290ada1030baae8d81f2a7208bb9fabb06744
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack lure. The embedded URL, https://netcdn.online/app/406889139/coin-master-hack-mobile-game-hack, is likely intended to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristics suggest a social engineering attack to redirect users to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-hack-mobile-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.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_004_off000052ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AE 24256 bytes
SHA-256: 634c8a41b9c56d7f525733875649b22e4dd10a0bd89c53a17e9726e96b67f233
font_01_sfnt_off00008a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 4076 bytes
SHA-256: 2cd6ad07f2bdb027000bc462c53fd97abeec32fdfcaa0083328d6e624805a980
font_02_sfnt_off00009850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9850 17948 bytes
SHA-256: d85bac05a6c530c5997aad474557790cc9f5c9ab79cb3a200cdd52cd9bbf1317

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