Malicious PDF — malware analysis report

Static analysis result for SHA-256 402572e776e306b4…

MALICIOUS

PDF

35.6 KB Created: 2021-06-22 07:19:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25c9ca502b6810ad21d13c6448d9f656 SHA-1: 5b0608680ef7287587f3b961574ec0cdbc83039f SHA-256: 402572e776e306b4c3692a3251af4da979fee2f52638e72bc553b8aba87d152a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks or free in-game currency. The ML classifier also flagged this PDF with high confidence. The embedded URLs likely lead to further malicious content or phishing pages, aiming to exploit user interest in popular games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/codigos-paa-hackear-roblox-game-hack In PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/como-ser-hacker-en-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/hack-list-for-roblox_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/mobil-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-free-animations-ninja_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://vireco-online.com/ckfinder/userfiles/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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
font_00_sfnt_off0000338a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338A 22664 bytes
SHA-256: 3bca82cda5859f53b3ece0219ac0bba2244c946aef0d4f73573e33e81a6cc645
font_01_sfnt_off00006634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6634 19104 bytes
SHA-256: aef13e5d3c413c9359e35fdf56f5a307acc7410dc86c95763404b1ba6f9d6d51