Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53c9ddabdbd6212…

MALICIOUS

PDF

45.7 KB Created: 2021-05-16 23:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 655ca2db03eb7098ce6bc4d1a64a2e56 SHA-1: 8743aba386f8237031c2b80e5ad4a6ecd1cdd3b5 SHA-256: e53c9ddabdbd6212f8df327d9d136fddfc9ebbe0d54f3e97a6854a95b8e17985
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector infrastructure, specifically targeting users with lures for game hacks and free resources. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spin-link-app-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/coin-master-free-spin-link-app-game-hack In PDF document text
    • http://ratchadatitan.com/UserFiles/File/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/robux-xyz_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-coin_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn 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
stream_003_off00004848.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4848 27740 bytes
SHA-256: 2931703a60a8202e396bf7d3c69f075dfb57a6176ce3d4d477071fccffeb2acb
font_01_sfnt_off00008717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8717 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000090b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B7 18056 bytes
SHA-256: 82bd5e5fc9f9c8e10db102fb3f3c15aafc022ab197dd07e70821ea88e25dcd6f