Malicious PDF — malware analysis report

Static analysis result for SHA-256 6349438473c0d2bf…

MALICIOUS

PDF

35.7 KB Created: 2021-06-26 22:05:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7e8267d67207fd71a72c70581c2f5b95 SHA-1: e77f07966ac6f467f55326d6ed121a5efc227bdd SHA-256: 6349438473c0d2bf5833cb68af571096b2807157fb295ce4ac4c64b52d0f41d4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF repositories. The primary URL, http://netcdn.co/app/431946152/games-on-roblox-that-give-you-free-robux-game-hack, suggests a lure for free in-game items. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the malicious intent. No scripts were extracted, but the overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/games-on-roblox-that-give-you-free-robux-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/vidio-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-waiting-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-escape-prison-life-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-diamond-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-xbox-360-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000034bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34BD 21828 bytes
SHA-256: 8c766c3a4e1c1362d06a7be64ca9e9b33632dc6f951a3dfdb6527a39fdf71aad
font_01_sfnt_off000064ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BA 19716 bytes
SHA-256: 3217d2b45e6aba390097db31ed4f489c97a69b2175e2ab7441deb7edbbce2f2f

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