Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa75f3044c56a89…

MALICIOUS

PDF

37.1 KB Created: 2021-05-10 15:41:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 549f6d37b843a36defaa137114b10120 SHA-1: 2042d2653ed3939e561bb6c6e79e889b9df8fad6 SHA-256: afa75f3044c56a891c1b68bd7d4b32c32e67c8c18a624f30d43c00fdbbc86196
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a game hack generator, presented with a fake CAPTCHA to trick the user into clicking it. The document body explicitly mentions "Coin Master Pro Hack" and "CLICK HERE TO ACCESS COIN MASTER GENERATOR", reinforcing the lure. The embedded URL points to a known malicious domain associated with such scams.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/coin-master-pro-hack-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000323c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323C 27364 bytes
SHA-256: 4b87c262d1e07f2a9771163efac51836700cf676b7bc728f6a8390feff1cda6e
font_01_sfnt_off000070d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D1 17868 bytes
SHA-256: 6fc94cfc5e353177abc481ae17561ea3edb8d825f50582b916d0cbb0f569bfa7

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