Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a17d2440152e0f2…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 17:25:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 56defc86bd5cfc6f080004b0710b481d SHA-1: 4a897c9c285c03631dcd8f51f49eee77e98925af SHA-256: 7a17d2440152e0f296d88f7c3b4dd167939023c0a6cba84bce39e35584df59f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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 http://netcdn.tw/app/431946152/free-robux-meme-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hack-csgo_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-robux-codes-free-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-boxing-simulator2-hack-for-wins_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-hack-robux-on-roblox-download_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-tricks-cheats_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8F 21684 bytes
SHA-256: 72d9378b0c92b18b833b7d8b5715d7c727b6a45652ee3096f4342d2ceff3164f
font_01_sfnt_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 19172 bytes
SHA-256: cc6f39551398ec7556c1100a0df569da4eadcef96f4621f512d193548eed02ae

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