Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bc631fe80919dc…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 09:53:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2dd8500bf008eed6b676e3a9aece952d SHA-1: 98357a0d5aa3c8589febb72ed11dc9f4011f1c71 SHA-256: d5bc631fe80919dc539eaaa740cf990aded89e45b5ebf0a9d000d3af84d88ed3
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 0.9971

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/coin-master-hacks-that-actually-work-game-hack PDF link annotation
    • http://razredna-nastava.net/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/mcpe-download_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-client_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/robloxfun-com-robux_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_off000049a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A9 24000 bytes
SHA-256: cfcc223b42479d2875dec1441f79db6ff080d14257f7ff12db7d41a9451930d2
font_01_sfnt_off00008079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8079 18472 bytes
SHA-256: 8403d92330cb41559737ed1496c4c5894a050c2f7b8d5bf65f27834ff4ec6c0c

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