Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2860f3e59f812b…

MALICIOUS

PDF

40.3 KB Created: 2021-04-22 16:24:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3e4c2e5f22812327c4d3b0e13256b5c7 SHA-1: 455d6e95a233e3c55dc3ba459a78abf7fb6e1d1f SHA-256: bc2860f3e59f812b2ecff9635a522027b4dd1c1c6e34d3a43b163fcbd207dc98
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.pro/app/431946152/free-bear-mask-roblox-game-hack PDF link annotation
    • http://blueduna.com/images/survivor-hack-scrip-t-roblox.pdfIn PDF document text
    • http://blueduna.com/images/roblox-creepy-april-foools-hack-face.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-xyz.pdfIn PDF document text
    • http://blueduna.com/images/brick-rewards-free-robux.pdfIn PDF document text
    • http://blueduna.com/images/free-candy-roblox-decal.pdfIn PDF document text
    • http://blueduna.com/images/speed-city-roblox-hack.pdfIn PDF document text
    • http://blueduna.com/images/free-roblox-high-school.pdfIn PDF document text
    • http://blueduna.com/images/robux-hack-february-2021.pdfIn PDF document text
    • http://blueduna.com/images/roblox-hack-05-2021.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-card-codes-2021.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_off00003dad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3DAD 26672 bytes
SHA-256: d6f86eb9bf1cead628ddcdef7fc7dcf6cf02e40c71c9bb04bb855bbff2004108
font_01_sfnt_off00007b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B02 18544 bytes
SHA-256: 23492e6af5dec24266805e288b7ee31f6fe776c14d82f305e558935d5c2b61d8

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