Malicious PDF — malware analysis report

Static analysis result for SHA-256 5677e9c04ce0d739…

MALICIOUS

PDF

39.1 KB Created: 2021-05-13 08:30:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 42281553bd7621e15e9866e2b2845712 SHA-1: 05716f9ddedb72da4b97eefeecb3c9a83652ad23 SHA-256: 5677e9c04ce0d7399b2987f80bc1a3434b15537dfc350fca5be2cdc490f37b59
170 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'Coin Master Free Spins Cheat' and presents a fake CAPTCHA to trick the user into clicking a malicious link. This link, 'https://netcdn.xyz/app/406889139/coin-master-free-spins-cheat-deutsch-game-hack', is identified as a known malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt designed to lead the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-free-spins-cheat-deutsch-game-hack In 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
font_00_sfnt_off000033ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33CE 25912 bytes
SHA-256: 90cb150b7a5382a55903685405c4e81e25f8dd5b32fb7a7847abf399ab645569
font_01_sfnt_off00006d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6F 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000775a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 18360 bytes
SHA-256: 29c800506a03a3e1cb5f7ed9e4ca185df1ecbea4e67b5de69ba2e14adc8da31f

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