Malicious PDF — malware analysis report

Static analysis result for SHA-256 8752891660ac4a8f…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 07:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: caaea6b7c9cc6073456762e3fa0dd42b SHA-1: 8fc23ab8858e5638b7c49d4fd8707a4f4b565ea6 SHA-256: 8752891660ac4a8fc12b4805161e975eff8a34a62ffa4b43b6929c63b7614ace
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to external URLs that are likely malicious. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs further supports a phishing or malware distribution attempt. No scripts were extracted, but the document's content and linked URLs suggest it's designed to trick users into downloading unwanted or harmful software.

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/download-hack-coin-master-apk-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-script-executor-roblox_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_off00004a27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A27 26004 bytes
SHA-256: 8d42757f500ff9954b46c725a2a2d07401d6d2ac66a3b02f4fc023d69981a28e
font_01_sfnt_off00008540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8540 18472 bytes
SHA-256: 48f2fb6a54f4a1d4da48af3cad9101beb926a58239587b90eb535e02f3a3ea4e

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