Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9473eca5f37516…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 22:19:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7342882a6463ac24e5a06040a17b2cf3 SHA-1: 6a1cc8a522fb5346fb5c9666ca124fb5e577e93c SHA-256: 9a9473eca5f37516af8cada4b5c71d6d6771a377cb88ef342587c0aee3d4473a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL and numerous other links to similar game-related "free generator" or "hack" PDFs, suggesting a social engineering attempt to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the presence of external URLs indicates an attempt to lead the user to a secondary malicious 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/479516143/client-minecraft-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pokemon-go-free-cheats_GM1094591345.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/100-free-spins-for-coin-master-2021_GM406889139.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_off000053a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A1 25788 bytes
SHA-256: 5ea3d139ac8bb59aa0cce32edce084cb33201f39f6471a97eeb1ded8dc097910
font_01_sfnt_off00008df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF8 3056 bytes
SHA-256: 3bf38ccea0f059764ae863929582790583b2dd886e86d92a85837ff3e16544f0
font_02_sfnt_off0000986c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986C 17644 bytes
SHA-256: 5ce6a379ae9f46d42512ba88e57e1f5186d7f60265a685918f3434c96255be0b

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