Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9d8cf8478003dd…

MALICIOUS

PDF

42.9 KB Created: 2021-05-14 20:49:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1fff53c22ba1daed34e138cc001ee295 SHA-1: 53042f3e584e35186e17ccf6a904935612f7f1dd SHA-256: cb9d8cf8478003dd15ec751905114137cbb99624ecd9e22b0def70cd7c5596b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a workflow designed to redirect users to potentially malicious sites for exploitation or further payload delivery.

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/coin-master-hack-2021-download-game-hack In PDF document text
    • http://casabea.de/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/coin-master-daily-free-coins-link_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_off00004c52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C52 24400 bytes
SHA-256: 354ffb31914b996c64e9cf4aa55212fa5ab84b227df0b894cab19e84e1ed5d65
font_01_sfnt_off00008405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8405 18696 bytes
SHA-256: 01e33fa384fcd9559826a4aa1de189e20085b3e2fa6b70097625b29721cffd1e

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