Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22aec50f1b621fb…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 05:38:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64ebe2548d76277e7ed5c45182fdb6c6 SHA-1: 1a0f88260acc064d67acca97893a3edf3671fe3b SHA-256: b22aec50f1b621fbf9140491db2827a13ceae4bc79b3927e2f96f8cc6481718c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators for popular games like Roblox and Coin Master. The document body and embedded URLs suggest a lure to trick users into visiting potentially malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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/is-roblox-free-on-pc-game-hack In PDF document text
    • http://kita-sunshine.de/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-free-spins-2021_GM406889139.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_off000049ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CA 24360 bytes
SHA-256: b2ab56cd93d929b0a915aaef4c73cfcf3b88b41f5f93d50d0dd75cebac4402fa
font_01_sfnt_off000081a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A5 19152 bytes
SHA-256: e6bf353f84747b5c8ab6c68ea197f3c2f7127dcf0ce948419b02a410edd5f878

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