Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c328cb6b9d0f26…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 14:25:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 51542561b378cad4b2b39c39cd499ba7 SHA-1: f77a4c016c6587435c9a2cd7597202ceee53d2d2 SHA-256: 15c328cb6b9d0f26b9a88df43380e50ef18700fb6c827598e3dc65e9af8304ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users to click on embedded links. The primary malicious URL identified, https://netcdn.xyz/app/406889139/free-coins-on-coin-master-2021-game-hack, is likely a redirector to a malicious site or a phishing page. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coins-on-coin-master-2021-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-generator-2021-no-survey_GM431946152.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
stream_003_off00004c2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2A 25328 bytes
SHA-256: b14897f7e05c1341486eecd776a19445678cc536489fc0d924a9e42d6737ffc7
font_01_sfnt_off00008646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8646 18112 bytes
SHA-256: c5e468742e62e06c21361d19e1ed31993db812d2d58ce4c8358e47098e3422dc

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