Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9bdaa2108aaf6c…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 09:42:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8e5420431092dcaa8728571e53c41f9 SHA-1: c8e0080c5f8ad77b3af9919166b073ef9fb2ea1a SHA-256: cd9bdaa2108aaf6c99c6ecdb233320ff65421b161a63fe515ddd2862c59b3f66
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack lures, designed to entice users into downloading further malicious content. The primary link, https://netcdn.xyz/app/406889139/hack-coin-master-2021-game-hack, is identified as a malicious redirector. The document body, though partially corrupted, contains references to game hacks and generator tools, reinforcing the lure. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution attempt.

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-coin-master-2021-game-hack In PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/dailyrobux_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/ways-to-get-robux_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_off000048bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BC 24196 bytes
SHA-256: efcb5091d3b8956e5026e435b0373db155cddc3587eb121531ae3176e5e44c54
font_01_sfnt_off00008049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8049 18116 bytes
SHA-256: a3df71077179c7440b1e4836f0868e786a4fbdd8e53d65e7c5dca2578e10a822