Malicious PDF — malware analysis report

Static analysis result for SHA-256 de555e27f206256c…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 07:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6965b0c11538e83fb2db0d3029df1989 SHA-1: aac7ad6f6d43b51d849734aa6dc34a6410e10d63 SHA-256: de555e27f206256c1dfcb9c4110a982e548bc588e697380e88a03885e456e7e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'game hack' that redirects to a known malicious URL. The document body, though heavily obfuscated, contains text related to 'free spins' and a URL that matches the heuristic findings. The presence of embedded links and the nature of the lure suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/hack-to-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://www.mieczewo.com/images/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.mieczewo.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/2021-roblox_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mieczewo.com/images/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mieczewo.com/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.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_003_off00004a5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5D 25620 bytes
SHA-256: 0d1e1cf7c454117fb39add9a9cc1616d4f6b58e8d8647ea7b16c9df305b8b74f
font_01_sfnt_off00008387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8387 18056 bytes
SHA-256: 2fbb404e8dbae95b2969f6d33f181e6a84e8673995acec3e52dde22e48280f02

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