Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a4049e659c145a…

MALICIOUS

PDF

42.2 KB Created: 2021-05-17 21:40:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e248217d33529aabb795c532506e4b0 SHA-1: 1039f14e5e09b64e128517d2f4d9dfd59cb8ac30 SHA-256: 90a4049e659c145a108817ac5ded9f499d93d96ca15a817ce3ec75effd110bb8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or malware distribution attempt. The embedded URLs, such as 'https://netcdn.xyz/app/431946152/roblox-assassin-game-hack', are designed to trick users into visiting potentially harmful sites. The presence of these links and the ML classifier's high confidence score strongly suggest malicious intent.

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/431946152/roblox-assassin-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-roblox-hack-us_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_off000049c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C5 25456 bytes
SHA-256: ceeb3b9f93150d5061703262b7429a625fc82ad2afc1006d6fdbf419ac8cf423
font_01_sfnt_off00008301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8301 18132 bytes
SHA-256: 9aaa8df6f0ee392d073232f21e4c453f2f39b896f85937247654776b23119032

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