Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fd4e2c3a0ceccb…

MALICIOUS

PDF

36.0 KB Created: 2021-05-21 10:32:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1071dded6a777167799258a8624c2b75 SHA-1: 301d6fa27e6d395303842c1bb501f382eced100b SHA-256: b7fd4e2c3a0ceccbc7cdf7cfc7015aa35da297f376380c72652ba294ef4e0d7d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacking, specifically for Coin Master and Roblox. The primary link, https://netcdn.xyz/app/406889139/how-to-hack-coin-master-game-hack, is flagged as a high-severity lure for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for downloading malware or engaging in phishing. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/406889139/how-to-hack-coin-master-game-hack PDF link annotation
    • https://i-tech.ac.id/perpus/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-spins-coin-master-2021_GM406889139.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_off00003321.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3321 25600 bytes
SHA-256: 6f67902fea217fc01f17ec9f729b70737955c2eede3055dff5aaeea33884399d
font_01_sfnt_off00006c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5E 17880 bytes
SHA-256: 811ddb8557bc0f5be85009fa6d5ae0baa2b7fc09c58d91c5790597872cecd122

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