Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfaf7ab3bfb0536c…

MALICIOUS

PDF

39.7 KB Created: 2021-04-27 00:37:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 70316e4d04faa5e979268fabf3f89cdf SHA-1: 1dce86f3fcfb71923e394b45d312b8cbbce4f229 SHA-256: bfaf7ab3bfb0536c54a4ea688d32d7084cf8732b7327f68a1fd8fd8d9e28c3df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one identified as a malicious redirector pointing to 'free-models-for-roblox-game-hack'. The document body also contains a call-to-action phrase 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

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/free-models-for-roblox-game-hack In PDF document text
    • http://www.saburai.ac.id/elibrary//repository/moon-tycoon-roblox-gives-free-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hack-roblox-2021-youtube.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-rich-roblox-accounts-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/can-you-go-to-jail-for-downloading-hacked-on-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-do-you-get-the-hack-no-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-and-cheats-apk.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hats-roblox-free.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_off00003e2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E2B 26768 bytes
SHA-256: f1a6a81c46cce144419e8ef5c00897968ccf64f7a67ccb1a60313794fc49333b
font_01_sfnt_off0000796d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 18316 bytes
SHA-256: 5ead9af70462c855ac92bab2d98dccc9575d4b0fc7740f478fa7373506fd95f3

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