Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71606fb62de8796…

MALICIOUS

PDF

40.8 KB Created: 2021-04-30 02:03:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bf441ae52a48ddb7af8862df58711e96 SHA-1: 51df5eb46c10c8ce747ecfd4ba664e4cf2827f0a SHA-256: c71606fb62de8796a4324729316393c1c705c75af60520aad2eb87678a8c6115
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The embedded URL, https://netcdn.xyz/app/431946152/roblox-welcome-to-bloxburg-beta-free-game-hack, likely leads to a malicious site designed to trick users into downloading further malware or revealing sensitive information. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/roblox-welcome-to-bloxburg-beta-free-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-naruto-final-bond-cheat-level-up.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-make-free-audio-in-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-glitch-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-cheat-in-roblox-counter-blox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-mo.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-counter-blox-roblox-offensive-hacks-very-op.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-without-paying-any-money.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/dumptruck-simulator-hack-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-games-and-free-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/forum-cheat-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 1

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_off00004422.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4422 24676 bytes
SHA-256: 0e49d3ba2919120c23758dcbe040830aa42ee7f59195a312aefd18ceed45c2c6
font_01_sfnt_off00007b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 19164 bytes
SHA-256: 64990886a97567018f7750ac7009e6e4391db4e481fc35fad0facfcc0f9ddb5a

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