Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3d5433f8187791…

MALICIOUS

PDF

35.5 KB Created: 2021-05-24 02:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 93343b429931cc8c018e639c6a8d85d3 SHA-1: 4b91b878eab4972a447b7b1801e2e8408259ba32 SHA-256: 6b3d5433f8187791ba07050b3cc5810733593b1d2d5743c0c4e90a4b3d18eb1c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to 'free Robux' and game hacks, directing users to external URLs. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a social engineering tactic to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the nature of the lures and embedded URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/431946152/get-free-robux-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-tiktok-accounts_GM835599320.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
font_00_sfnt_off00002f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F55 25716 bytes
SHA-256: fab0eb2d63b245a15face410861d301166c82af9b4bdc5323803eb2cfba82540
font_01_sfnt_off000069d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D2 18120 bytes
SHA-256: 79ac164380d838bf2943c127f808202d45f8751c05dbd036140e6fb9b1b49848

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