Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa03cfcc98be245…

MALICIOUS

PDF

39.6 KB Created: 2021-05-16 06:30:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6d2eb08d4005e92d390018b444eeca02 SHA-1: 4786cc64295a54f38975429e4afc7e2ef36b5b7a SHA-256: 9fa03cfcc98be2457b2fd1203efd2c3394c9cce0a360a12ebe542bd5fb6264c3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it links to a game hack generator, a common lure for malicious content. The document body explicitly mentions "How To Get Free Coins In Coin Master" and includes a "CLICK HERE TO ACCESS COIN MASTER GENERATOR" call to action, directly linking to a suspicious URL. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8089

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-get-free-coins-in-coin-master-game-hack PDF link annotation
    • https://www.stmik-time.ac.id/perpustakaan/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://stmik-time.ac.id/perpustakaan/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000036be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36BE 25768 bytes
SHA-256: 598aa2a85b6a97b09b5727eb09a0ecb6c77f4159318266a7c9c645f50af06b46
font_01_sfnt_off000070b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A68 17872 bytes
SHA-256: ea6dcb3ab890178a05547e3161835c8edeffae3732ad32b35eba99407f3e1bd5

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