Malicious PDF — malware analysis report

Static analysis result for SHA-256 27875ffc82b501e8…

MALICIOUS

PDF

36.7 KB Created: 2021-05-20 14:14:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a45e9818b042a6e6d1adc3045b4fc95f SHA-1: 72659818c071d331bebc32204e513c3544aab27d SHA-256: 27875ffc82b501e8267fa4c3d9fd6b21650536efa2d2089431b2e5daf52465b2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering 'free generators' or 'hacks' for popular games, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a potentially harmful site, likely for malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/479516143/minecraft-mojang-free-game-hack PDF link annotation
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/give-me-robux_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/easy-robux-today-com_GM431946152.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_002_off000033e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E9 25760 bytes
SHA-256: c44c693b1e8978497699f43201dc80b3595a60d0b86a5b3db9672997d7f6db6c
font_01_sfnt_off00006e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 18188 bytes
SHA-256: b5f50bf57dfccd752109e4182842bacf3724a00f1b96a34c084e43a5ee255f71

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