Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81a4c456136a340…

MALICIOUS

PDF

47.1 KB Created: 2021-05-15 17:30:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 220dfcc4f1c03243816759844a226d89 SHA-1: 15c11f58de797e47dd3737af408c48fd2246436c SHA-256: f81a4c456136a34042b75aef63a3573304e83d2892257cafbfbc6f5acc463d3c
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 0.8948

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/431946152/free-100-robux-game-hack PDF link annotation
    • http://simon-skov-fougt.dk/billeder/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/oprewards-com-earn_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004862.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4862 28744 bytes
SHA-256: e321d24462a4ab22dc33cfce0af4bb4763fb160f6f078f0ad425cf442eed769c
font_01_sfnt_off00008a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A26 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off000095ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BA 18292 bytes
SHA-256: ade71c57547996cc2793a44f7be3e933a3a5664d4c8f362da863e6c031d51f12

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