Malicious PDF — malware analysis report

Static analysis result for SHA-256 199f22281c6966c5…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 01:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da220282c19156209ed7a290053334de SHA-1: b5203d267a50868e4f7805b4a1757e5178aa047d SHA-256: 199f22281c6966c5d2099597f9b8aea90acdc1ae58e8c2ca202f9343b92c184e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks and free in-game currency. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the nature of the lures suggests the embedded URLs likely lead to malicious downloads or phishing pages, aligning with common social engineering tactics.

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/daily-coin-master-free-spin-link-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/robux-online_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-wings_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
stream_003_off00004a9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9B 24312 bytes
SHA-256: f47913802840435e7385aaa1071b767a2e5805359cf7240b6328d87a7899fe7b
font_01_sfnt_off000081dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 18476 bytes
SHA-256: 0e8ff706f766ebeac8fd51df3b46864e48e50accc558ba14dc70aa8347bf43ac

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