Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fe798b1e84b381…

MALICIOUS

PDF

43.6 KB Created: 2021-04-27 05:39:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8a78a2a1e2a12dc21caac5b0c1f1466 SHA-1: 251220959422fe5d3bbc837eadc686453f78e57d SHA-256: e4fe798b1e84b381c0788ef07b8b25b63a3cf550ec9115acb80ba0acc59b4793
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" for Roblox, directing users to a suspicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 4

  • 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.
  • 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/forum-comment-cheat-sur-roblox-game-hack PDF link annotation
    • 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/roblox-redeem-toy-codes-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-snowman-package-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/egg-hacker-2021-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-copy-game-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-really-easy.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-dinosaur-simulator-cheat-engine.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/infinite-money-hack-roblox-jailbreak.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-dungeon-quest-hack-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-toy-codes-december-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41C9 25844 bytes
SHA-256: e162704489a1a1beedaf948a2261a19fa0ef0655f6a0d860288a96637ebd4f89
font_01_sfnt_off00007d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D45 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000086f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F6 18848 bytes
SHA-256: 33f30a21261e3a58a507384735b4851aedbd20a14ea721e835215a5599e9c7d3

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