Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21258fc0a531f3c…

MALICIOUS

PDF

40.7 KB Created: 2021-04-28 02:34:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aaf7730c9b7237e5ee16a1fb0bf5b643 SHA-1: d03332aeeaf179d0a86a7599e530dbf4897bd3ab SHA-256: a21258fc0a531f3c9a8a0d6ad017129eb5835ac2c5daec6f9cab5f1f21e93d49
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures related to Roblox. The primary malicious URL identified is https://netcdn.xyz/app/431946152/can-u-get-hacked-through-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or social engineering attack designed to lead users to potentially harmful content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/can-u-get-hacked-through-roblox-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-bot.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/buzz-the-bee-gives-free-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/top-10-mejores-hacks-para-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/give-me-free-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/anarchy-v3rm-hack-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-gear-in-roblox-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/rosie-hacks-caillous-roblox-account.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-earn-robux-in-roblox-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-cheat-engine-how-to-get-btools.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-cards-not-used.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F1 24976 bytes
SHA-256: dad7b8f3932916b6ccbc0edebd21b6fa7d94d8a12f980c40e7c0b93811101c82
font_01_sfnt_off00007a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6A 19240 bytes
SHA-256: 8a12e9c5392475b017d957f544c654f3fe345011c69eed00c22aca9b583bf871

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