Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ed8883ac1a1179…

MALICIOUS

PDF

42.6 KB Created: 2021-04-24 00:10:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 24358460f4ad1e90b84d633d8f257aed SHA-1: 81c07c5d8df25478628341eea20f7f8005519210 SHA-256: 16ed8883ac1a11794de46f1eef22a9c29b68e71c5f5908cfe822b5068b350199
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/army-roblox-free-play-game-hack PDF link annotation
    • http://blueduna.com/images/robux-hack-computer-only.pdfIn PDF document text
    • http://blueduna.com/images/clickme-roblox-giving-free-robux.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-stuff-that-cost-robux-for-free.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-todat.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-games-not-scams.pdfIn PDF document text
    • http://blueduna.com/images/earn-free-robux-scam.pdfIn PDF document text
    • http://blueduna.com/images/best-roblox-dll-hack.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-generatoir.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-hck.pdfIn PDF document text
    • http://blueduna.com/images/roblox-mobile-money-cheats.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_off00004021.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4021 29884 bytes
SHA-256: d8b08f57eee50d949f114576896eadcb042b5454c59911a3cf7f1d220325342e
font_01_sfnt_off0000836b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836B 18768 bytes
SHA-256: cdfd1a73b13c194d2463b42e52e31dc9a4e45e3eff2d063361d8cbcaee7ecd35

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