Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e324e5f34c8f7c…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 18:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dc3f53a382817d73cb8f559fd29a0da5 SHA-1: e012e289847a7af9ea55e805a9239be80ed1559a SHA-256: f9e324e5f34c8f7c6cf898b17ab5601d1387d05d5bd2a518149cac47f93503c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'free Robux' and game hacks. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-com-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious content, aligning with spearphishing attachment techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-com-free-robux-game-hack In PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/chisel-and-bits-mod-minecraft-pe_GM479516143.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
stream_003_off0000475f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x475F 25784 bytes
SHA-256: 334195ab30726de2dc02b8cf66a832e4611cef47e16137d3458cc218710d47e0
font_01_sfnt_off0000820e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820E 18348 bytes
SHA-256: c296ce3e2e2a101d3e2a91d968c24b195b6c9a3a72cf9c6f74fe8dc429b2d5e3

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