Malicious PDF — malware analysis report

Static analysis result for SHA-256 899bec23472965cc…

MALICIOUS

PDF

42.0 KB Created: 2021-04-27 09:45:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b275d0da38ab6bd6fbfb3fcb044ca6f SHA-1: 9bfe786a49b245287f0c0e277d4533825325ab4b SHA-256: 899bec23472965cc2a79445a5e8408928b4978f6b2d966a5f3904d85dea2da01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "free Robux" generators. The document body and embedded URLs strongly suggest a social engineering lure to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users.

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/how-can-i-get-free-robux-super-easy-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-vip-for-free-on-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/february-22-btools-hack-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robuxcom-real.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-jailbreak-noclip-hack-cheat-engine.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-dragon-ball-z-final-stand-zeni-hack.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/easy-hacks-roblox-download.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-millions-of-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-cheat-source-leaked.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/pastbin-robux-hacks-for-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-bot.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_off00004094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4094 27920 bytes
SHA-256: 2917fc9582ba1217e44925f1c469e24c2f0e4ba611b32c8329714f0525f4ad09
font_01_sfnt_off000080bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BC 18868 bytes
SHA-256: cc9d7eb729df79fe3af7676aee69f24a3815ff73886e5663676cb7c3bee0d379

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