Malicious PDF — malware analysis report

Static analysis result for SHA-256 f581b0b409273a7d…

MALICIOUS

PDF

39.6 KB Created: 2021-04-27 08:58:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e96c2edc9830f1b6f5ea7a1f9720f0f7 SHA-1: fa169557f1a8a200bd7c9ad14f1604ca116ad95e SHA-256: f581b0b409273a7dc4b0560b1660c22202f4cf2dfb6512a51db8edca8b862bdf
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'free Robux' and game hacks, indicating a social engineering attempt to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the 'game hack' lure suggest an attempt to trick users into downloading or visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/blox-fun-info-free-robux-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/skin-hack-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-r-free-robux-robux-robux-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-a-free-membership-on-roblox-useing-hacks.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-toy-codes-december-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-those-who-remain-hack-script.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-api-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-speed-race-hacks-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-cheat-engine-download-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-hair-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-faces-on-roblox-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00003dc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3DC5 26696 bytes
SHA-256: ba5a3826ddc66c60520e7d8fbdc126b96e2668a0ddf1616384b1d3d36a5c0535
font_01_sfnt_off00007990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 18088 bytes
SHA-256: 02761d37c1e65cacae78672f3965c9d159bca7d4671923f91f20253722a48bee

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