Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23d784c75d1b0f1…

MALICIOUS

PDF

43.8 KB Created: 2021-05-10 22:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d425f13c53e6167341ff9b53d753e3d8 SHA-1: 0dccc81c484bbc1c1dd21632aa8bc186f2069f7c SHA-256: a23d784c75d1b0f1e940e8065006f614471c2c181c25a42694980a129f9f149d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9969

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/free-robux-no-scam-game-hack PDF link annotation
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-apps-that-work_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_off000048cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CB 28116 bytes
SHA-256: f288ee0bf79290fa252aeea572edb6500f4423e1310ce648c94a254fc4ac249d
font_01_sfnt_off0000885e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 18500 bytes
SHA-256: b3a5a2e86a30a2234a3ee6d3c2f7de48a52411aef28342c5883490dd6d64f819

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