Malicious PDF — malware analysis report

Static analysis result for SHA-256 4456fe2a08f04742…

MALICIOUS

PDF

40.7 KB Created: 2021-04-23 13:36:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fa7a49bf93b5d19feaee49e6595cee2d SHA-1: 8be3504f0a5901647d1865e3be3d017edb49e6ca SHA-256: 4456fe2a08f047429bbeba83fcd8be00742bed0f9aa537cdb7b04d8f6185c28c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://netsecure.top/app/431946152/roblox-cheat-money-lumber-tycoon-2-game-hack PDF link annotation
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-201-exploit-free-lvl7.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-to-play-roblox-jail-break.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-2021-free-robux.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/radio-cheat-roblox-script.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-cheat-without-human-verification.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-how-to-get-free-gear-2021.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-get-a-free-private-server-on-roblox-jailbreak.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-hack-robux-420.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/account-stealing-hack-roblox-pastebin.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/robloxmania-com-free-robux.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_off000040f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40F9 25312 bytes
SHA-256: c4bf1899e4f31556d2ba89b670e1c511b1d8e0cab724d9ce717a3056ad9d50c5
font_01_sfnt_off00007a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A94 19184 bytes
SHA-256: 9073146d5d17c0d1dcb4e147298215ff7768d4e7cea005255e1b25461ad3fdac

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